GT3.0
Owner’s Manual
Xantrex Grid Tie
Solar Inverter
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Xantrex Grid Tie Solar Inverter
Owner’s Manual
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About Xantrex
Xantrex Technology Inc. is a world-leading supplier of advanced power electronics and controls with products from
50 watt mobile units to one MW utility-scale systems for wind, solar, batteries, fuel cells, microturbines, and backup
power applications in both grid-connected and stand-alone systems. Xantrex products include inverters, battery
chargers, programmable power supplies, and variable speed drives that convert, supply, control, clean, and distribute
electrical power.
Trademarks
Xantrex Grid Tie Solar Inverter is a trademark of Xantrex International. Xantrex and Xanbus are registered
trademarks of Xantrex International.
Other trademarks, registered trademarks, and product names are the property of their respective owners and are used
herein for identification purposes only.
Notice of Copyright
Xantrex Grid Tie Solar Inverter Owner’s Manual © September 2004 Xantrex International. All rights reserved.
Disclaimer
UNLESS SPECIFICALLY AGREED TO IN WRITING, XANTREX TECHNOLOGY INC. (“XANTREX”)
(a) MAKES NO WARRANTY AS TO THE ACCURACY, SUFFICIENCY OR SUITABILITY OF ANY
TECHNICAL OR OTHER INFORMATION PROVIDED IN ITS MANUALS OR OTHER DOCUMENTATION.
(b) ASSUMES NO RESPONSIBILITY OR LIABILITY FOR LOSS OR DAMAGE, WHETHER DIRECT,
INDIRECT, CONSEQUENTIAL OR INCIDENTAL, WHICH MIGHT ARISE OUT OF THE USE OF SUCH
INFORMATION. THE USE OF ANY SUCH INFORMATION WILL BE ENTIRELY AT THE USER’S RISK.
Date and Revision
September 2004 Revision B
Part Number
975-0131-01-01
Contact Information
Telephone: 1 800 670 0707 (toll free North America)
1 360 925 5097 (direct)
Fax:
1 800 994 7828 (toll free North America)
1 360 925 5143 (direct)
Email:
Web:
www.xantrex.com
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About This Manual
The purpose of this Owner’s Manual is to provide explanations and procedures for
installing, operating, maintaining, and troubleshooting the Xantrex Grid Tie Solar
Inverter™.
Scope
The manual provides safety guidelines, detailed planning and setup information. It
provides procedures for installing the inverter and information about operating
and troubleshooting the unit. It does not provide details about particular brands of
photovoltaic (PV) panels. You need to consult individual PV manufacturers for
this information.
Audience
The manual is intended for anyone who needs to install and operate the GT
Inverter. Installers should be fully educated on the hazards of installing electrical
equipment. Certified electricians or technicians are recommended.
Organization
This manual is organized into 6 chapters and an appendix.
Chapter 1, “Introduction”, contains information about the features and functions
of the Xantrex Grid Tie Solar Inverter.
Chapter 2, “Installation”, provides information about planning for and installing
the GT Inverter. It contains information to help you plan wire routes, AC and DC
connections, and find a suitable location for installation. It also discusses
requirements for grounding the GT Inverter and your PVarray.
Chapter 3, “Wiring the Inverter”, provides procedures for making DC and AC
wiring connections, and grounding the GT Inverter and the PV array. Instructions
for wiring inverters in parallel are also provided.
Chapter 4, “Starting the Inverter”, contains information on starting up the Xantrex
Grid Tie Solar Inverter and performing a Functional Test.
Chapter 5, “Monitoring the Inverter”, contains information for understanding the
LCD screens and the LED indicators.
Chapter 6, “Maintenance and Troubleshooting”, contains information about how to
provide general maintenance for the Xantrex Grid Tie Solar Inverter. It also
provides information about troubleshooting the unit.
Appendix A, “Specifications”, contains information about the electrical and
environmental specifications of the Xantrex Grid Tie Solar Inverter.
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About This Manual
Conventions Used
The following conventions are used in this guide.
WARNING
Warnings identify conditions that could result in personal injury or loss of life.
CAUTION
Cautions identify conditions or practices that could result in damage to the unit or other
equipment.
Important: These notes describe things which are important for you to know, but not as
serious as a caution or warning.
Abbreviations and Acronyms
AC
Alternating Current
CSA
DC
Canadian Standards Association
Direct Current
GT
Grid Tie
GUI
LCD
LED
MPPT
PC
Graphical User Interface
Liquid Crystal Display
Light Emitting Diode
Maximum Power Point Tracking
Personal Computer
Photovoltaic
PV
PVGFP PV Ground Fault Protection
PWM
STC
UL
Pulse Width Modulation
Standard Test Condition
Underwriters Laboratories
Volts AC
Vac
Vdc
Volts DC
V
V
Voltage at Maximum Power
MP
OC
Open Circuit Voltage
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About This Manual
Related Information
You can find more information about Xantrex Technology Inc. as well as its
products and services at www.xantrex.com
Other useful documentation on photovoltaic systems includes:
•
“A Guide to Photovoltaic (PV) System Design and Installation”, California
Energy Commission (CEC), publication #500-01-020, June 2001 (available at
www.energy.ca.gov).
•
“California Interconnection Guidebook: a Guide to Interconnecting
Customer-owned Electric Generation Equipment to the Electric Utility
Distribution System using California’s Electric Rule 21”, California Energy
Commission (CEC), publication #500-03-083, September 2003 (available at
www.energy.ca.gov).
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Important Safety Instructions
SAVE THESE INSTRUCTIONS—This manual contains important instructions that shall be followed
during the installation and maintenance of the Xantrex Grid Tie Solar Inverter.
1. Before installing and using the GT Inverter, read all instructions and cautionary markings on the
inverter, wiring box, and all appropriate sections of this guide.
2. To reduce risk of fire hazard, do not cover or obstruct the heat sink.
3. Observe the clearance recommendations as described on page 2–18. Do not install the GT Inverter in a
zero-clearance or non-ventilated compartment. Overheating may result.
4. Use only accessories recommended or sold by the manufacturer. Doing otherwise may result in a risk
of fire, electric shock, or injury to persons.
5. To avoid a risk of fire and electric shock, make sure that existing wiring is in good condition and that
wire is not undersized. Do not operate the GT Inverter with damaged or substandard wiring.
6. Do not operate the GT Inverter if it has received a sharp blow, been dropped, or otherwise damaged in
any way. If the GT Inverter is damaged, see the Warranty section.
7. Do not disassemble the GT Inverter. It contains no user-serviceable parts. See Warranty for instructions
on obtaining service. Attempting to service the GT Inverter yourself may result in a risk of electrical
shock or fire and will void the factory warranty.
8. To reduce the risk of electrical shock, disconnect both AC and DC power from the GT Inverter before
attempting any maintenance or cleaning or working on any circuits connected to the inverter. Turning
off controls will not reduce this risk. Internal capacitors remain charged for 5 minutes after
disconnecting all sources of power.
9. The GT Inverter must be provided with an equipment-grounding conductor connected to the AC
ground.
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Safety
Regulatory Compliance
The GT Inverter has complete on-board over-current, over-temperature and anti-islanding protection, and
meets U.S., Canadian and international safety operating standards and code requirements:
•
•
•
UL 1741 – Standard for Inverters, Converters, and Controllers for Use in Independent Power Systems
CSA C22.2 No. 107.1-01 General Use Power Supplies
IEEE C62.41 Recommended Practice on Surge Voltages in Low-Voltage AC Power Circuits (Location
Category B3).
To locate the firmware version number
The firmware version number for the protection processor is visible on a screen that appears when the unit
starts up or is powered up after switching the AC/DC Disconnect switch to “on.” The screen reads:
The number appearing after “ROM” is the firmware version number for the protection processor.
FCC Information to the User
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the instructions, may cause harmful interference to
radio communications. However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or television reception, which can
be determined by turning the equipment off and on, the user is encouraged to try to correct the interference
by one or more of the following measures:
•
•
•
•
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and the receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
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Safety
Verification and Commissioning Test
Purpose
This procedure is designed to verify correct operation of the Xantrex Grid Tie Solar Inverter both on initial
operation and periodically through its life as required by the utilities.
Commissioning Test
Follow the startup and monitoring procedures as documented in Chapters 4 and 5.
When operation of the inverter has been verified and the unit is producing power, run the Non-Islanding
test as described in this procedure.
Verification Test
Periodically run the Non-Islanding test. The inverter must respond within the 2-second limit for
compliance and then hold off on producing power for the required delay (default value of 5 minutes).
Non-Islanding Test
This test requires that the AC circuit for the inverter be switched off. This can be accomplished by
switching the breaker on the main panel that feeds the inverter(s). As an alternate, the disconnect for the
home or business may be used as well. Have someone watch the front panel of the inverter. Within 2
seconds of switching the breaker, the green light on the front of the inverter must go out. The display will
respond with an AC Fault display, indicating that the AC is out of the operating range.
Re-energize the breaker to the inverter. The unit will respond by beginning its countdown. The green light
will be off during this time. Five minutes after applying AC (default value), the green light will turn on and
the inverter will begin to push power to the grid. The display will then return to its on-line display showing
the power being produced along with the total kWh produced to date.
Note: The default voltage, frequency and reconnect delay values as defined by UL1741 and CSA 107.1-01
are programmed into the unit at time of shipment from the factory. No changes to these settings can be
made in the field by the user. Only authorized personnel with the utility’s permission may change these
settings. Contact Xantrex Technology to gain permission and the procedure/equipment to make these
changes.
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Contents
Important Safety Instructions
Regulatory Compliance - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - viii
FCC Information to the User - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - viii
Verification and Commissioning Test - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ix
1
Introduction
About the Xantrex Grid Tie Solar Inverter- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–2
Standard Features - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–3
Optional Features - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–4
Safety and Standards - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–5
Removable Components- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–6
Wiring Box (standard on North American models) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–6
Optional Heat Sink Cover and Fan - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–7
Model Configurations - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–8
2
Installation
Installation Options - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–2
Single Inverter Installation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–2
Multiple Inverter Installations - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–2
Planning the Installation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–2
Inverter Location - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–4
PV Array Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–5
Grounding Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–8
Routing the Wires - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–11
Preparing for the Installation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–13
Wiring - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–13
Circuit Breakers and Disconnect Switch - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–13
Other Materials Needed - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–14
Equipment Needed - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–14
Mounting the Inverter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–15
Overview - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–15
Preparing to Mount the Unit - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–16
Installing the Mounting Bracket - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–17
Mounting the Inverter on the Bracket - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–22
Installing Accessories- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–23
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Contents
3
Wiring the Inverter
Accessing the Wiring Terminals - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–2
Connecting the DC Wiring- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–4
Connecting the AC Wiring- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–7
Connecting Inverters in Parallel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–10
DC and AC Wiring for Inverters in Parallel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–10
Communications Wiring for Inverters in Parallel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–12
Xanbus Network Technology - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–12
Guidelines for Routing the Network Cables - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–15
Connect the Communications Cable between Inverters in Parallel - - - - - - - - - - - - - - - - - - -3–16
4
5
Starting the Inverter
Startup Procedure - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–2
Checking the PV Array DC Voltage - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–2
Checking the AC Utility Voltage - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–2
Replacing the Wiring Box Cover - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–3
Starting up the GT Inverter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–4
Monitoring the Inverter
Monitoring the Front Panel Display- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–2
Front Panel Display Screens and What They Mean - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–3
Startup Mode - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–3
Normal Operation Mode - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–3
Offline Mode - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–5
Fault Mode - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–6
Special Screens - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–8
Custom Screens - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–9
Status Indicator Lights- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–9
6
Maintenance and Troubleshooting
Factors Affecting GT Inverter Performance - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–2
PV Array Factors - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–2
Other Factors - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–3
Performing General Maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–3
Replacing Parts - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–3
Replacing the Ground Fault Protection Fuse - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–4
Replacing the Inverter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–5
Identifying Error/Fault Conditions and Solutions- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–8
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Contents
A
Specifications
Electrical Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–2
Input - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -A–2
Output - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -A–2
Adjustable disconnect settings - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -A–3
Efficiency - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -A–4
Environmental Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–5
User Display - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -A–5
Mechanical Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–5
Accessories - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–6
Warranty and Return Information
Warranty - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - WA–1
Disclaimer - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - WA–2
Return Material Authorization Policy - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - WA–3
Return Procedure- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - WA–3
Out of Warranty Service- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - WA–3
Information About Your System - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - WA–4
Index
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Figures
Figure 1-1 Basic System Overview - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–2
Figure 1-2 Main Features of the GT Inverter- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–4
Figure 1-3 Safety and Data Label Locations - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–5
Figure 1-4 Wiring Box for the GT Inverter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–6
Figure 1-5 Optional Heat Sink Cover and Fan Assembly for the GT Inverter - - - - - - - - - - - - - - - - 1–7
Figure 2-1 Installation Options Overview- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–3
Figure 2-2 Basic Grounding Overview- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–9
Figure 2-3 Long Distance Grounding Overview - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–10
Figure 2-4 Grounding With Extra Lightning Protection Overview - - - - - - - - - - - - - - - - - - - - - - 2–11
Figure 2-5 Knockout Locations on Bottom of Wiring Box - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–12
Figure 2-6 Installation Overview- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–15
Figure 2-7 Dimensions of GT Inverter and Knockout Locations- - - - - - - - - - - - - - - - - - - - - - - - 2–17
Figure 2-8 Mounting Bracket and GT Inverter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–18
Figure 2-9 Examples of Mounting on a Pole or Rails - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–20
Figure 2-10 Installing the Mounting Bracket using Plywood Support - - - - - - - - - - - - - - - - - - - - - 2–21
Figure 2-11 Proper Placement of the Inverter on the Mounting Bracket - - - - - - - - - - - - - - - - - - - 2–22
Figure 2-12 Attaching the fan assembly- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–24
Figure 2-13 Location of Fan Connector - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–25
Figure 3-1 Removing the Wiring Box Cover- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–2
Figure 3-2 AC and DC Terminal Block Location in the Wiring Box- - - - - - - - - - - - - - - - - - - - - - 3–3
Figure 3-3 AC/DC Disconnect Switch Positions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–4
Figure 3-4 DC Connections for Grounded PV Array - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–6
Figure 3-5 AC Connections from GT Inverter to Utility Service Panel - - - - - - - - - - - - - - - - - - - - 3–9
Figure 3-6 Parallel GT Inverter DC and AC Wiring - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–11
Figure 3-7 Daisy Chain Layout- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–12
Figure 3-8 Male Network Terminator - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–13
Figure 3-9 Xanbus RJ45 Ports in the GT Inverter Wiring Box - - - - - - - - - - - - - - - - - - - - - - - - - 3–13
Figure 3-10 RJ45 Connector - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–14
Figure 3-11 Communications Wiring for GT Inverters in Parallel - - - - - - - - - - - - - - - - - - - - - - - 3–17
Figure 4-1 AC/DC Disconnect Switch Positions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–4
Figure 5-1 Front Panel LCD Location - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–2
Figure 5-2 Location of Status Indicator Lights - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–10
Figure 6-1 Location of Fuse, Front Panel Cover Removed - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–5
Figure 6-2 Inverter and Wiring Box Sections - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–7
Figure A-1 Output Power vs. Ambient Temperature - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -A–3
Figure A-2 Typical Efficiency- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -A–4
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Tables
Table 1-1
Table 2-1
Table 2-2
Table 3-1
Table 3-2
Table 3-3
Table 5-1
Table 5-2
Table 5-3
Table 5-4
GT Inverter Models- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–8
MPPT Operational Window - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–6
Inverter Clearance Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–18
Torque Values for Wires* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–5
T568A Standard Wiring - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–14
Network Components and Part Numbers- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–15
Startup Screens on GT Inverter Front Panel Display - - - - - - - - - - - - - - - - - - - - - - - - - 5–3
Normal Operation Default Screen - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–4
Normal Operation Screens for All GT Inverter Units - - - - - - - - - - - - - - - - - - - - - - - - 5–4
Additional Normal Operation Screens for Each GT Inverter Unit
in a Multiple Unit System- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–5
Table 5-5
Table 5-6
Table 5-7
Table 5-8
Table 5-9
Offline Mode Default Display- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–5
Offline Mode Screens for All GT Inverter Units- - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–6
Additional Offline Mode Screens for Each GT Inverter Unit in a Multiple Unit System - 5–6
Fault Message Screens- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–7
Additional Fault Mode Screens - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–8
Table 5-10 Special Message Screens - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–8
Table 5-11 Status Indicator LEDs - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5–9
Table 6-1
Troubleshooting the GT Inverter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6–8
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Introduction
1
Chapter 1, “Introduction”, contains information about the features
and functions of the Xantrex Grid Tie Solar Inverter.
The topics in this chapter are organized as follows.
“About the Xantrex Grid Tie Solar Inverter”:
•
•
“Standard Features” on page 1–3
“Safety and Standards” on page 1–5
“Removable Components”:
•
•
“Wiring Box (standard on North American models)” on page 1–6
“Optional Heat Sink Cover and Fan” on page 1–7.
“Model Configurations”.
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Introduction
About the Xantrex Grid Tie Solar Inverter
The Xantrex Grid Tie Solar Inverter (GT Inverter) is designed to convert solar
electric (photovoltaic or PV) power into utility-grade electricity that can be used
by the home or sold to the local power company.
Installing the GT Inverter consists of mounting it to the wall and connecting the
DC input to a PV array and the AC output to the utility. See Figure 1-1 for a
simple diagram of a typical installation.
In order to operate, the GT Inverter must have grid power available and connected.
It will not provide backup power if the AC grid fails.
Photovoltaic(PV)
Panels - PV Array
Utility
Meter
UtilityGrid
Harvested
solar energy
Surplus power
routed toUtility Grid
Power routed
to loads
DC converted
to AC
MainUtility
Grid Tie Inverter
Service Panel
Xantrex
GT Inverter
Loads
Figure 1-1 Basic System Overview
1–2
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About the Xantrex Grid Tie Solar Inverter
PV compatibility
The GT Inverter is designed to take advantage of solar modules configured as high
voltage PV string arrays—single crystalline, poly crystalline, or thin film—with a
195 to 550 Vdc input voltage Maximum Power Point range.
Maximum Power
Point Tracking
(MPPT)
The GT Inverter uses Xantrex proprietary Maximum Power Point Tracking
(MPPT) technology to harvest the maximum amount of energy from the solar
array. MPPT learns your array’s specific characteristics, maximizing its output at
all times.
High efficiency
Expandable
The high-frequency, solid-state design of the GT Inverter is extremely efficient—
up to 95%.
Multiple GT Inverters may be connected in a parallel configuration for increased
net metering capacity or future system growth.
®
Communications
protocol
The GT Inverter uses the Xanbus Communications protocol, enabling it to
communicate with other units connected in parallel within the system. For more
information, see “Xanbus Network Technology” on page 3–12.
Standard Features
The GT Inverter has the following standard features:
•
Sealed inverter section with multiple wiring options to facilitate a variety of
installation requirements (e.g., hard-wired, “quick-connects,” wiring box with
terminals, or with AC/DC disconnect);
•
LCD providing easy-to-read system status and daily cumulative energy
production information;
•
•
Two LED indicator lights providing status and ground fault indication;
Wiring box providing protection for all AC and DC connections and
eliminating exposed “live” wiring if the inverter is removed.
WARNING: Shock hazard
The 600 volt DC/AC disconnect in the wiring box meets NEC Article 690. It is a non-
serviceable component and shall remain in place. Removal can expose energized
conductors.
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Introduction
Optional Features
GT Fan Kit (Xantrex part # 864-0201) includes:
•
Heat sink cover
Fan assembly.
•
Xantrex GT3.0 Inverter
Heat Sink
Optional Heat Sink cover
LCD
LED Indicator Lights
Wiring Box
AC/DC Disconnect Switch
Mounting Slots
Figure 1-2 Main Features of the GT Inverter
1–4
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About the Xantrex Grid Tie Solar Inverter
Safety and Standards
Meets standards and
requirements
The GT Inverter has complete on-board over-current, over-temperature and anti-
islanding protection, and meets U.S., Canadian and international safety operating
standards and code requirements:
•
UL 1741 – Standard for Inverters, Converters, and Controllers for Use in
Independent Power Systems
•
CSA C22.2 No. 107.1-01 General Use Power Supplies.
Safety Label
Location
Data Label
Location
Figure 1-3 Safety and Data Label Locations
Figure 1-3 shows the location of the safety label and the data label with model,
serial and part number information.
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Introduction
Removable Components
The wiring box is standard for all North American models of the GT Inverter.
Some European models are available without the wiring box. See “Model
Configurations” on page 1–8 for specific details. The heat sink cover and fan
assembly are available in the optional Fan Kit.
Wiring Box (standard on North American models)
The wiring box provides a location for making AC, DC and ground connections.
It also contains the combined AC/DC (Utility/PV array) Disconnect Switch.
The GT Inverter unit may be easily removed from the wiring box in the event that
the inverter requires servicing.
Important: In North America and other locations the wiring box is an electrical code
requirement. It must be attached during operation. Check with your local authorities
before removing the GT Inverter wiring box.
DC Connect holes
Control Board
Connect hole
AC Connect hole
1.9 cm (3/4”) Threaded
Wiring Box
Front Cover
Conduit holes
AC/DC Disconnect
Switch
Figure 1-4 Wiring Box for the GT Inverter
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Removable Components
Optional Heat Sink Cover and Fan
In areas where high ambient temperatures (>45°C/110°F) may be experienced
(such a south-facing installation), a heat sink cover and fan assembly (GT Fan Kit,
Xantrex part # 864-0201) can be added to the front of the unit. The fan assembly
provides forced-air ventilation directly over the heat sink. The heat sink cover
shades the heat sink from direct sunlight and provides a pathway to funnel the
forced-air from the fans over the heat sink to optimize cooling.
WARNING: Burn hazard
In extreme conditions, the GT Inverter chassis can reach temperatures over 70°C (158°F),
which can cause skin burns if accidentally touched. Ensure that the GT Inverter is located
away from normal traffic areas.
See Figure 1-3 on page 1–5 for safety label location.
Heat Sink Cover
Top view
Fan Assembly
Front view
Figure 1-5 Optional Heat Sink Cover and Fan Assembly for the GT Inverter
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Introduction
Model Configurations
The GT Inverter model number is in the format GTx.x-aa-bb-ccc, where:
•
•
x.x
aa
Output Power: 3.0 KW
Region:
NA (North America)
DE (Germany)
SP (Spain)
IT (Italy)
FR (France)
•
•
bb
Wiring Box:
WB (wiring box only)
DS (wiring box with AC/DC disconnect switch)
HW (no wiring box)
QC (Quick Connects and no wiring box , Europe
only, not available at this time)
ccc
Output Voltage: 208 Vac/60 Hz (North America) 3 phase
230 Vac/50 Hz (Europe) 3 phase
240 Vac/60 Hz (North America).
See Figure 1-3 on page 1–5 for data label location.
Table 1-1 shows the different model configurations available.
Table 1-1 GT Inverter Models
1
208
230
240
√
√
√
√
√
√
√
GT3.0-NA-bb-208
2
1
3.0
√
GT3.0-aa -bb-230
GT3.0-NA-bb-240
1. 208 Vac/60 Hz and 230 Vac/50 Hz models not available at this time
2. any region (aa) except NA
Installation and wiring instructions are provided in Chapter 2, “Installation”, and
Chapter 3, “Wiring the Inverter”.
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Installation
2
Chapter 2, “Installation”, provides information about planning for and
installing the GT Inverter. It contains information to help you plan
wire routes, AC and DC connections, and find a suitable location for
installation. It also discusses requirements for grounding the GT
Inverter and your PVarray.
Procedures are provided for installing the Xantrex Grid Tie Solar
Inverter.
The topics in this chapter are organized as follows:
•
•
•
•
•
“Installation Options” on page 2–2
“Planning the Installation” on page 2–2
“Preparing for the Installation” on page 2–13
“Mounting the Inverter” on page 2–15
“Installing Accessories” on page 2–23.
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Installation
Installation Options
The GT Inverter may be installed as a single inverter for a single PV array of one
or two PV strings, or in a multiple inverter configuration for multiple PV arrays
(see Figure 2-1 for diagrams of both options).
Single Inverter Installation
In this configuration, a single inverter collects the harvested solar energy and
routes the power to the main utility service panel to be used by the loads. Any
surplus power not used by the loads will be injected into the utility grid.
Multiple Inverter Installations
If multiple inverters are used, each inverter must be wired to an independent PV
array. In this configuration, each inverter collects the harvested solar energy from
a separate PV array and routes the power to the main utility service panel to be
used by the loads. Any surplus power not used by the loads will be injected into
the utility grid.
Communications between inverters is optional, but can be enabled by installing
communications cabling to the inverter RJ45 ports. See “Connect the
Communications Cable between Inverters in Parallel” on page 3–16.
Planning the Installation
The following issues need to be considered when planning for an installation
using the GT Inverter. See the specified sections for more information.
•
•
•
•
“Inverter Location” on page 2–4
“PV Array Requirements” on page 2–5
“Grounding Requirements” on page 2–8
“Routing the Wires” on page 2–11.
Ensure that you have obtained all permits required by local authorities or utilities
before commencing installation.
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Planning the Installation
UtilityGrid
Single Inverter Installation
Utility
Meter
Xantrex
GT Inverter
MainUtility
ServicePanel
Photovoltaic Panels - PV Array
PV String #1
Surpluspower
routedtoUtility Grid
DC
converted
to AC
Loads
Harvested solar energy
Grid Tie Inverter
PV String #2
Power routed
toloads
UtilityGrid
Multiple Inverter Installation
#2
PV Array #1
Utility
Meter
Harvested
solar energy
Xantrex GT Inverters
MainUtility
Service Panel
Surpluspower
routed toUtility Grid
PhotovoltaicPanels:
Multiple PV Arrays
DC
converted
Loads
to AC
Harvested
solarenergy
Power routed
toloads
Grid Tie Inverter
Grid Tie Inverter
GT Inverter #1
GT Inverter #2
DC converted to AC
#1
PV Array #
Figure 2-1 Installation Options Overview
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Installation
Inverter Location
WARNING: Burn hazard
Do not install in a location where people can accidentally come into contact with the front
of the inverter. High temperatures can be present on the face of the inverter, causing a
potential burn hazard.
In extreme conditions, the GT Inverter chassis can reach temperatures over 70°C (158°F),
which can cause skin burns if accidentally touched. Ensure that the GT Inverter is located
away from normal traffic areas.
Inverter failure due to improper installation will void the inverter warranty.
Consider the following when determining where to install the inverter.
•
•
Do not install anywhere near combustible or flammable materials.
Fire Safety
The GT Inverter uses a Type 3R-rated enclosure (vertical mount
only) that can be mounted indoors or outdoors. (Type 3R
enclosures are intended for outdoor use primarily to provide a
degree of protection against falling rain; and to be undamaged by
the formation of ice on the enclosure.)
Indoor/Outdoor
•
While the 3R-rated enclosure protects the GT Inverter from
moisture, outdoor installations should be located away from lawn
sprinklers and other sources of spray.
•
•
The GT Inverter must be mounted vertically on a wall or pole.
Do not mount the GT Inverter horizontally.
Orientation
Temperature
•
Ensure that the GT Inverter is mounted in a location where the
ambient temperature range is -25° to +65° C (-13° to +149° F).
At extreme hot or cold temperatures, the front panel LCD may not
function normally. Above 45° C (113° F), the unit begins derating
power. See “Environmental Specifications” on page A–5 and
“Output Power vs. Ambient Temperature” on page A–3.
•
•
•
Outdoors, the GT Inverter requires at least 100 cm (39 inches) of
clearance between the bottom of the unit and the ground.
Indoors, it is recommended that the same clearance between the
bottom of the unit and the floor be used.
Ground
Clearance
•
To minimize copper losses, ensure that wire lengths between the
PV array and the GT Inverter and between the inverter and the
Main Utility Service Panel are kept to a minimum.
Maximum distances will depend on wire gauges used and PV
array output voltages.
Distance
•
•
Excessive debris (e.g., dust, leaves, cobwebs) can accumulate on
the unit, interfering with wiring connections and ventilation. Do
not install in a location where debris can accumulate (such as
under a tree).
Debris free
2–4
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Planning the Installation
PV Array Requirements
WARNING: Shock hazard
Whenever a PV array is exposed to sunlight, a shock hazard exists at the output wires or
exposed terminals. To reduce the risk of shock during installation, cover the array with an
opaque (dark) material before making any connections.
General Recommendations
It is important that the PV array is installed correctly to the manufacturer’s
specifications and to local code requirements.
For general recommendations on PV array installation, the CEC Guide to
Photovoltaic System Design and Installation document referenced in “Related
Information” on page v is recommended. It is available at www.energy.ca.gov.
Equipment and Installation Recommendations
The following PV array equipment and installation recommendations are taken
from the CEC Guide to Photovoltaic System Design and Installation document
referred to above.
Important: The PV array should be free of shade between 9:00 AM and 4:00 PM. This
requirement includes even small obstructions such as vent pipes, chimneys and power
lines. A small amount of shade can have a disproportionately high impact on system
performance.
Equipment
recommendations
•
All electrical equipment should be listed for the voltage and current ratings
necessary for the application.
•
•
•
All wiring should be sized correctly to minimize voltage drop.
All exposed wires or conduits should be sunlight resistant.
All required overcurrent protections should be included in the system and
accessible for maintenance.
•
Depending on the installation, an external disconnect may be required if the
inverter is installed in a location not easily accessible to utility or fire
personnel. Consult local authorities for additional information.
•
•
Integral roofing products should be properly rated.
Installation
recommendations
All electrical terminations should be fully tightened, secured, and strain
relieved as appropriate.
•
•
•
All mounting equipment should be installed according to the manufacturer’s
specifications.
All roof penetrations should be sealed with an acceptable sealing method that
does not adversely impact the roof warranty.
All wires, conduit, exposed conductors and electrical boxes should be secured
and supported according to code requirements.
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Installation
Voltage and MPPT Requirements
MPPT operational
window
Ensure that the PV array used in the system operates within the MPPT operational
window (Table 2-1).
Table 2-1 MPPT Operational Window
Voltage
Effect of Array Voltage
Inverter Mode
< 195 Vdc
Operating voltage will be shifted to 195 Vdc; Low power
the array will not be at its maximum power
point
195 to 550 Vdc
550 to 600 Vdc
Maximum harvest of solar energy
MPPT window
Power derating
Will not allow maximum harvest of solar
energy
> 600
Will shut down and may cause damage to the Shutdown
inverter; stops selling surplus energy
Voltage
requirements
The maximum power point voltage of a string connected to the GT Inverter should
be a minimum of 195 Vdc. If it is less than 195 Vdc, then the power point is
shifted and the PV voltage is regulated to 195 Vdc.
By regulating the operating voltage of the solar modules, the MPPT software
maximizes their output energy.
Effects of array voltages outside of the MPPT operational window are shown in
Table 2-1.
Maximum PV
Power
The solar array should be sized such that its maximum power output does not
exceed the limits of the MPPT operational window (195 to 550 Vdc). See
“Guidelines for Matching PV Array Size to Xantrex Grid Tie Solar Inverter
Input”.
Under no conditions should the array voltage exceed 600 V (open circuit
OC
voltage).
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Planning the Installation
Guidelines for Matching PV Array Size to Xantrex Grid Tie Solar Inverter Input
For determining the number of panels required in the PV string (panels connected
in series), you must ensure that the following two requirements are met:
1. To avoid damage to the inverter, ensure that the PV array output will never
exceed 600 Vdc under any conditions.
2. To achieve maximum energy harvest from your array, ensure that the V
MP
(voltage at maximum power) does not drop below 195 Vdc or increase above
550 Vdc under most conditions.
Guidelines to help you meet these requirements:
•
Consider the expected V of the string under all possible conditions. The
OC
panel manufacturer provides a V rating per panel, but it is usually rated at
OC
25°C (77°F). Panel voltage increases in cold temperatures—the panel
manufacturer should be able to provide a coefficient of voltage increase per
degree.
•
The NEC also has required temperature/voltage deratings that must be used;
these can be found in Table 690.7 of the 2002 NEC handbook. You need to
determine the coldest temperatures expected on the site, and size the array
strings accordingly. The array’s maximum DC voltage in coldest expected
temperature, with both manufacturer coefficient and NEC derating, must not
exceed 600 Vdc to prevent inverter damage.
•
Panel voltage decreases in high temperatures. This will affect the panels’
V
. Again, the manufacturer’s coefficient must be used with the highest
MP
expected temperature to determine the minimum V
.
MP
Once you know the specifications of your panels, all these factors will help
determine the maximum and minimum number of panels that can be used.
Visit www.xantrex.com/support to use an online PV array sizing tool.
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Installation
Grounding Requirements
WARNING: Shock hazard
The GT Inverter must be grounded by connection to a grounded permanent wiring system.
AC Grounding
North America
The GT Inverter must be connected to a grounded, permanent wiring system.
The negative PV conductor must be bonded to the grounding system at only one
point in the system, through the internal Ground Fault Detection circuit.
See Figure 2-2 for the location of the GT Inverter ground bar.
Elsewhere
In other locations, AC grounding is governed by local codes. Consult with the
local utility for specific grounding requirements.
PV Grounding
In North America, PV arrays are required to be connected to earth ground; in
Europe they are not. PV Ground Fault Protection (PVGFP) is required in North
America for roof-mounted PV arrays.
The GT Inverter is designed to have all PV positive, negative, and ground
conductors connected inside its wiring box. The PV equipment ground should be
connected to the GT Inverter ground bar. This ground bar must also be connected
to the main utility breaker panel ground bar and to the house grounding rod
according to NEC requirements (see Figure 2-2).
The size for the conductor is usually based on the size of the largest conductor in
the DC system.
Long Distance Grounding
If the PV array is more than 30 m (100 feet) from the inverter, then there must also
be a direct connection from the array frame to an earth ground next to the array. A
connection between this ground and the building ground connection via a buried
wire between the two points is also necessary (see Figure 2-3).
Lightning Protection
Reduce the risk of lightning damage by using a single-point grounding system. In
this system, all ground lines terminate at the same point. This point normally is the
main utility ground installed by the utility company to provide a ground for the
house wiring (see Figure 2-4). This ground usually consists of a copper rod driven
1.5 to 2.5 meters (6 to 8 feet) into the earth.
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Planning the Installation
Main Utility
Service Panel
PV Array
L2
L1
G
NEUTRAL
PV String #1
G
Neutral
-to-
Ground
Bond
PV String #2
G
GROUND
G
Xantrex GT Inverter
Wiring Box
GND bar
Primary Earth
Ground
AC/DC Disconnect
Switch
Figure 2-2 Basic Grounding Overview
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Installation
PV Array
When the distance between the PV Array and the GT
Inverter is greater than 30 m (100 ft), the array should have
its own earth ground, which should be connected to the
Primary Earth Ground by a buried wire.
PV String #1
Check your local codes for grounding requirements.
G
PV String #2
G
Main Utility
Service Panel
L2
L1
NEUTRAL
Array
Earth
Ground
Distance >30 m (100 ft)
Neutral
-to-
Ground
Bond
GROUND
G
G
Xantrex GT Inverter
Wiring Box
GND bar
Primary
Earth
G
Ground
AC/DC Disconnect
Switch
(buried wire)
Figure 2-3 Long Distance Grounding Overview
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Planning the Installation
Main Utility
Service Panel
PV Array
L2
L1
PV String #1
NEUTRAL
G
Neutral
-to-
Ground
Bond
PV String #2
G
GROUND
G
G
Xantrex GT Inverter
Wiring Box
GND bar
Primary
Earth
G
AC/DC Disconnect
Switch
Ground
Figure 2-4 Grounding With Extra Lightning Protection Overview
Routing the Wires
Typical
configurations
Determine all wire routes to and from the GT Inverter. Typical routing
configurations include:
•
•
•
AC wiring from the GT Inverter to the main utility service panel
DC input wiring from the PV array to the GT Inverter
DC ground from the PV array to the Primary Earth Ground.
All wiring and installation methods should conform to applicable electrical and
building codes.
For installations in the United States, the National Electrical Code (NEC) and
local codes apply. For installations in Canada, the Canadian Electrical Code
(CEC) and local codes apply.
For all installations, local utilities may have additional requirements.
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Installation
Conduit
holes/knockouts
Pre-plan the wire and conduit runs. Knockouts for 1.9 cm (3/4 inch) or 2.5 cm
(1 inch) conduit holes are located on the bottom and back of the wiring box.
Threaded 3/4” conduit holes are located on each side of the wiring box
(Figure 2-5).
For maximum safety, run AC, DC, and communication wires in separate conduits.
Front of Wiring Box
Right side
Left side
1.9 cm (3/4”) Threaded
Conduit Holes
1.9 cm (3/4”) or 2.5 cm (1”) Knockouts,
also on back of Wiring Box
Back of Wiring Box
AC/DC Disconnect Switch
Figure 2-5 Knockout Locations on Bottom of Wiring Box
WARNING: Shock hazard
Check for existing electrical or plumbing prior to drilling holes in the walls.
Planning AC Wire Routing
AC connections include all the wires and connectors between the GT Inverter AC
terminals and the main utility service panel. Pre-plan these routes carefully before
installing the components.
Planning DC Wire Routing
DC connections include all the wires and connectors between your PV array and
the DC terminals of the GT Inverter. Pre-plan these routes carefully before
installing the components.
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Preparing for the Installation
Preparing for the Installation
Ensure your local utility is consulted for any requirements for connecting to or
returning power to the grid. Obtain all permits necessary to complete the
installation. Consult your local/national electrical code for more information.
This section includes the following topics:
•
•
•
•
“Wiring” on page 2–13
“Circuit Breakers and Disconnect Switch” on page 2–13
“Other Materials Needed” on page 2–14
“Equipment Needed” on page 2–14.
Important: In this manual “wiring” and “wires” are used in reference to both AC and
DC wiring/cabling and wires/cables.
Wiring
Wire size and length will be determined by the location of each component and
their relative distance to each other. Wire sizes may also be affected by whether or
not conduit is used.
Recommended wire
stripping length
Strip all wires 9 mm (3/8 inch).
Acceptable wire
sizes
The AC and DC terminal blocks in the GT Inverter accept wire sizes from
#14 AWG to #6 AWG.
Wiring should be sized such that the maximum voltage drop at full power from
the PV array to the inverter is 2% or less.
Important: Wiring should not be undersized. Undersizing of wiring can result in
significant power losses and reduction in system efficiency.
Circuit Breakers and Disconnect Switch
The following circuit breakers, disconnect switch and fuse are required for
installing this equipment.
AC Circuit Breaker Requirements
In North America, the main utility service panel must dedicate a double pole
breaker (240 volts AC) to operate each GT Inverter installed. The GT Inverter
requires a 20-Amp breaker.
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Installation
AC/DC Disconnect Switch
The wiring box includes a PV/Utility disconnect switch that switches both AC and
DC at the same time. If the inverter is to be installed without the integral Xantrex
Wiring Box with Disconnect (Xantrex Part # 100-0243-01-01), separate approved
AC and DC disconnects may be required by local authorities having jurisdiction.
WARNING: Shock hazard
The 600 volt DC/AC disconnect in the wiring box meets NEC Article 690. It is a
non-serviceable component and shall remain in place. Removal can expose energized
conductors.
Ground Fault Fuse
There is a 600 volt 1-Amp ground fault protection fuse (Littelfuse KLKD 1 or
equivalent) in the GT Inverter.
WARNING: Shock hazard
Do not attempt to service the ground fault fuse yourself. This should only be done by
qualified service personnel.
Other Materials Needed
•
•
•
Mounting support material, such as plywood or poles
Conduit for wire runs and appropriate fittings/bushings
Wood screws and anchors for screws, depending on mounting surface.
Equipment Needed
•
•
•
•
•
Wire cutters/wire crimpers/wire strippers
Assorted screwdrivers, drill, etc.
Level
Digital Voltmeter
Frequency counter (optional, for troubleshooting).
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Mounting the Inverter
Mounting the Inverter
Overview
WARNING: Fire, Shock and Energy Hazards
Before installing the GT Inverter, read all instructions and cautionary markings located in
this manual, on the PV array, and on the main service panel.
General installation
steps
There are four main steps in the installation of the GT Inverter:
1. Mounting the GT Inverter and installing accessories (this chapter)
2. Making the DC connections from the PV array to the GT Inverter
(“Connecting the DC Wiring” on page 3–4)
3. Making the AC connections from the GT Inverter to the main utility service
panel (“Connecting the AC Wiring” on page 3–7)
4. Grounding the PV array (see your PV equipment documentation).
Figure 2-6 summarizes these four steps.
PV Panels
Primary Earth/
Ground
4
Utility
Meter
UtilityGrid
600 Vdc
2
Open
Circuit
Maximum
3
Grid Tie Inv erter
MainUtility
Service Panel
1
Xantrex GT Inverter
Figure 2-6 Installation Overview
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Installation
In this chapter only the first step, mounting the inverter and installing accessories,
is described.
Mounting steps
Instructions for mounting the GT Inverter are described in the following sections:
•
•
•
•
“Preparing to Mount the Unit” on page 2–16
“Installing the Mounting Bracket” on page 2–17
“Mounting the Inverter on the Bracket” on page 2–22
“Installing Accessories” on page 2–23.
Multiple inverter
instructions
Mounting instructions for multiple inverters connected in parallel are described in
“Mounting Multiple Inverters in Parallel” on page 2–23.
Special wiring instructions for multiple inverters connected in parallel are
described in “Connecting Inverters in Parallel” on page 3–10.
Preparing to Mount the Unit
Dimensions and Knockout Locations
The dimensions of the inverter and the mounting bracket and some of the
knockout locations on the wiring box are shown in Figure 2-7.
Four 2 cm or 2.5 cm (3/4 inch or 1 inch) knockouts are provided on the back and
bottom of the unit to accommodate wiring:
•
two on the bottom of the wiring box, on either side of the AC/DC Disconnect
Switch
•
two on the back of the wiring box.
Four 2 cm (3/4 inch) conduit holes on the sides of the wiring box are filled with
plastic plugs, which can be removed to insert conduit nipples as required for
inverters mounted in parallel. One or two of these side conduit holes may be used
to accommodate communications wiring for multiple inverters mounted in
parallel.
Knockout Preparation
Remove your choice of knockouts from the wiring box to facilitate conduit
installation for wire runs. This is much easier to do prior to mounting the inverter.
Important: Ensure there are no metal shavings left in the inverter after removing the
knockouts. Be sure to install bushings or conduits in the knockout holes to protect the
wires from damage.
If installed outdoors, conduit must be sealed where it enters the wiring box.
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Mounting the Inverter
Side view
Front view
40.3 cm
14.6 cm
5.7"
15.9"
Heat Sink
Cover
55.0 cm
21.6"
69.6 cm
27.4"
Front Panel
Wiring Box
72.5 cm
28.5"
2 cm (3/4") conduit
holes with threaded
caps, on both sides
Dual 2 cm or 2.5 cm
(3/4" or 1") knockouts,
back and bottom
Flange and
Mounting Slots
5.8 cm
2.278"
Figure 2-7 Dimensions of GT Inverter and Knockout Locations
Installing the Mounting Bracket
The mounting bracket for the GT Inverter allows the unit to be easily mounted and
dismounted for servicing. It has two hooks that match corresponding hooks on the
back side of the inverter and wiring box. The inverter can be separated from the
wiring box and removed from the bracket, leaving the wiring box in place.
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Installation
Mounting bracket
Back side of the inverter
25.3 cm (10")
Rectangular slots × 25:
8 mm × 30 mm
(5/16" × 1-3/16")
Mounting flanges
Mounting flanges
Mounting slots for securing the inverter
Figure 2-8 Mounting Bracket and GT Inverter
Clearance Requirements
For optimal and safe operation, ensure there is adequate clearance around the
inverter. The minimum clearance recommendations in Table 2-2 assume a vertical
mounting. If clearances are reduced below these minimums, rated power may not
be achieved.
Table 2-2 Inverter Clearance Requirements
Location
Above
Minimum Clearance
30 cm (12 inches)
Outdoors:
Below:
•
•
Inverter
Bracket
•
•
100 cm (39 inches)
110 cm (43 inches)
The inverter extends below the
bracket by approximately 10 cm
Indoors: the same clearances are (4 inches)
recommended but not required.
In front
Sufficient room to allow for easy access to read the display and to
prevent accidental contact with hot surface.
On sides
15 cm (6 inches) to prevent thermal derating. When mounting units
side by side, 30 cm (12 inches) of clearance between the two units is
recommended.
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Mounting the Inverter
WARNING: Shock hazard
Before drilling holes to mount the GT Inverter, ensure there are no electrical wires or
plumbing in this area.
WARNING: Personal injury
The GT Inverter weighs approximately 20 kg (45 lbs). Always use proper lifting
techniques during installation to prevent personal injury.
WARNING: Explosion hazard
Do not store combustible or flammable materials anywhere near the inverter.
Surfaces for Mounting
The GT Inverter weighs approximately 20 kg (45 lbs). The supporting surface
must be strong enough to handle 75 kg (160 lb). If the supporting surface is not
strong enough to handle that weight, then supporting material such as a sheet of
plywood can be used to enhance the strength of the mounting surface.
The GT Inverter can be mounted to a vertical surface such as wallboard, wood
siding, concrete wall or pole assembly.
Mounting on poles
or rails
•
See “Mounting on Poles or Rails” on page 2–20. Ensure the bottom of the unit
is a minimum of 100 cm (39 inches) from the ground if mounted outdoors.
Mounting to
wallboard with
support
•
•
Installation onto wallboard requires either the use of a supporting material
such as plywood or securing the mounting screws to supporting wall studs.
Use at least two screws and anchors to secure the unit to the supporting
material.
Mounting to siding
using wall studs
If mounting to exterior siding using a wall stud for support, the plywood
backing will not be needed. Use at least two lag screws to secure the unit to
the supporting material. Ensure the screws enter the stud at least 4 cm
(1.5 inches) to adequately support the weight of the unit. See “Mounting on
Wallboard, Siding or Concrete” on page 2–21.
Mounting to
concrete surface
•
If mounting the unit on a concrete surface using anchors with no supporting
material, use four screws and anchors, instead of two, to adequately secure the
unit and distribute the weight.
Important: Local codes may impose additional mounting requirements in earthquake
or other high-risk areas.
Important: Other than the mounting bracket, no mounting hardware is supplied with
the GT Inverter.
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Installation
Mounting on Poles or Rails
To mount the unit using poles:
1. Ensure that poles or rails are securely assembled in place. If using horizontal
rails, three rails are required: two for the mounting bracket and a third for
securing the bottom edge of the inverter wiring box (see Figure 2-9).
2. Connect the mounting bracket vertically to the poles or rails (Figure 2-9):
•
Be sure to use at least two bolts to secure the mounting bracket to the
support.
•
Position the lower edge of the bracket a minimum of 110 cm (43 inches)
above the floor or ground.
3. If using a single vertical pole, ensure that the inverter is secure and unable to
rotate around the pole.
Mounting Bracket
At least 2 bolts to
48 cm
secure bracket to
(18.9”)
poles/rails.
15 cm
(5.9”)
For securing
110 cm
the bottom of
the wiring box
(43”)
100cm
(39”)
Ground /
Floor
Ground /
Floor
Figure 2-9 Examples of Mounting on a Pole or Rails
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Mounting the Inverter
Mounting on Wallboard, Siding or Concrete
To mount the GT Inverter to wallboard, siding, or concrete:
1. Locate the area where the GT Inverter is to be installed.
2. Install backing support material if required. See Figure 2-10.
Atleast 2screws
30 cm (12")
with washers to
secure bracket
to plywood
110 cm (43")
110 cm (43")
Ground / Floor
Single GT Inverter
Ground / Floor
Dual GT Inverters
Figure 2-10 Installing the Mounting Bracket using Plywood Support
3. Using a level, place the mounting bracket against the wall surface at least
110 cm (43 inches) from the ground. See Table 2-2 on page 2–18 to ensure
minimum clearance requirements are met.
4. Mark the location for mounting screws if using a wall stud for support. At
least four mounting screws and anchors are needed for concrete installations
or wallboard installations where no wall studs are available for support.
For multiple inverters mounted in parallel, the brackets should be mounted
30 cm (12 inches) apart. Inverters mounted less than 30 cm (12 inches) apart
may not achieve full rated power.
5. Remove the bracket and drill the holes using an appropriately sized drill bit.
Drill appropriately sized holes for screws or anchors.
6. Secure the bracket to the supporting surface using at least two screws and
washers.
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Installation
Mounting the Inverter on the Bracket
Mounting a Single Inverter
To mount the inverter on the mounting bracket:
1. Place the GT Inverter’s mounting hooks, located on the back of the enclosure,
over the bracket and ensure the inverter is seated properly, as shown in
Figure 2-11.
2. After the unit is correctly seated on the bracket hooks, locate the mounting
slots in the flange below the wiring box and mark the location on the wall for
securing screws.
3. Remove the inverter and drill pilot holes in the wallboard or siding for the
securing screws.
4. Reinstall the GT Inverter on the bracket and secure the bottom of the unit with
appropriate screws or anchors, and tighten.
Slide the mounting hooks on the inverter
over the hooks on the mounting bracket.
flange with
mounting slots
Ensure the inverter is seated
properly on the mounting bracket
Figure 2-11 Proper Placement of the Inverter on the Mounting Bracket
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Installing Accessories
Mounting Multiple Inverters in Parallel
As shown in Figure 2-10, inverters can be mounted side by side on wallboard or a
plywood support. A minimum of 30 cm (12 inches) of clearance between the units
is recommended.
Conduit nipples should be installed on one side of the first inverter before
mounting on the bracket. Ensure that the sealing ring is located on the conduit
nipple between inverters, i.e., on the outside of the wiring box. The lock nut is
attached after the nipple is inserted into the conduit hole of the second inverter
Installing Accessories
The optional fan assembly and heat sink cover (see Figure 1-5 on page 1–7)
should be installed together. Neither accessory should be installed without the
other.
Installing the Fan Assembly
WARNING: Shock hazard
If the inverter is already installed and operational, turn OFF the breaker switches in the
main utility service panel and the AC/DC Disconnect switch on the inverter wiring box
before performing this procedure.
WARNING: Shock hazard
Hazardous voltages may be present when cover is removed. After disconnecting all
sources of energy, wait 5 minutes before removing cover.
WARNING: Burn hazard
Ensure that the inverter and heat sink are not too hot to touch before attempting this
procedure.
Important: The fan assembly should only be installed by qualified personnel.
The fan assembly (see Figure 1-5 on page 1–7) is optional for the GT Inverter.
Installing the fan assembly involves two main steps:
1. Attaching the fan assembly to the inverter.
2. Connecting the fan wires.
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Installation
To attach the fan assembly to the inverter:
1. Using a Phillips screwdriver, remove the four panhead screws and washers
from the front panel of the inverter (two screws on each side), immediately
below the heat sink (see Figure 2-12).
2. Place the fan bracket with screw holes overlapping the screw holes on the
inverter. The fans should be facing up, on the upper side of the fan bracket.
3. Replace the four panhead screws and washers removed in step 1.
Figure 2-12 Attaching the fan assembly
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Installing Accessories
To connect the fan wires:
1. Remove the wiring box cover by removing the two screws on the underside of
the wiring box. Removing the wiring box cover will expose the screws that
secure the front panel cover.
2. Remove the front panel cover by removing the two screws on the underside of
the front panel.
3. Plug the wire leads from the fan assembly into the pin connectors on the DC
circuit board. The pins are located to the left of the LCD below the ground
fault protection fuse.
4. Replace the front panel cover using the screws removed in step 2, with the
wire leads passing through the notch at the top of the cover, ensuring that the
wires are not pinched.
5. Replace the wiring box cover using the screws removed in step 1.
Fan connectors
Figure 2-13 Location of Fan Connector
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Installation
Installing the Heat Sink Cover
You may find it easier to install the heat sink cover before mounting the inverter.
If the inverter is already installed and in operation, it is best to perform the
following procedures after dark or on an overcast day when the unit is cool.
WARNING: Burn hazard
Ensure that the inverter and cover are not too hot to hold firmly before installing or
removing the heat sink cover.
To install the heat sink cover on the inverter:
1. Hold the heat sink cover vertically in front of you with the curved edge
upward and the flanges bent away from you.
2. Insert the heat sink cover left side flange into the groove on the left side of the
inverter heat sink. It should snap into place.
3. Push the cover so that it curves outward (away from the inverter) and insert
the right side flange into the groove on the right side of the inverter heat sink.
It should snap into place.
To remove the heat sink cover from the inverter:
Important: You may start with the left or right side of the cover. This example starts
on the right side.
1. Press the right side of the heat sink cover inward (i.e., toward the left side) and
simultaneously lift it upwards to pull it out of the groove on the right side of
the inverter.
2. Pull the left side of the cover out of the inverter left side groove.
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Wiring the Inverter
3
Chapter 3, “Wiring the Inverter”, provides procedures for making DC
and AC wiring connections, and grounding the GT Inverter and the
PV array. Instructions for wiring inverters in parallel are also
provided.
The topics in this chapter are organized as follows:
•
•
•
•
“Accessing the Wiring Terminals” on page 3–2
“Connecting the DC Wiring” on page 3–4
“Connecting the AC Wiring” on page 3–7
“Connecting Inverters in Parallel” on page 3–10.
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Wiring the Inverter
Accessing the Wiring Terminals
You must remove the GT Inverter wiring box cover to access the terminal blocks,
ground bar and communications ports (for inverters in parallel).
To remove the wiring box cover:
1. Using a Phillips screwdriver, remove the two screws on the bottom side of the
wiring box and set in a safe place (see Figure 3-1 for location of screws).
2. Lift the cover off the wiring box.
When replacing the wiring box cover, be careful not to pinch any wires in the
wiring box.
Wiring box
cover screws
Knockouts
Figure 3-1 Removing the Wiring Box Cover
AC and DC connections are made at the wiring terminals shown in Figure 3-2.
Insulating barrier
The clear plastic insulating barrier inside the wiring box is a permanent
component. It is intended to separate the high-voltage AC and DC wiring from
any communications cabling and to prevent wiring from coming into contact with
the wiring box cover.
When wiring the unit, it is necessary to pull the cover back to access the wiring
terminals. After completing the wiring, replace the insulating barrier to its original
position.
Communications
wiring
For multiple inverters in parallel, communications wiring is connected between
RJ45 connectors on each inverter (see Figure 3-9).
3–2
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Accessing the Wiring Terminals
AC Terminals for
connecting to main
utility service panel
DC Terminals
for connecting
PV arrays
AC/DC
Disconnect
Switch
Figure 3-2 AC and DC Terminal Block Location in the Wiring Box
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Wiring the Inverter
Connecting the DC Wiring
WARNING: Shock hazard
Whenever a PV array is exposed to sunlight, a shock hazard exists at the output wires or
exposed terminals. Ensure that the AC/DC Disconnect Switch is set to OFF before
commencing any wiring. See Figure 3-3.
WARNING: Shock hazard
The 600 volt AC/DC disconnect in the wiring box meets NEC Article 690. It is a
non-serviceable component and shall remain in place. Removal can expose energized
conductors.
Figure 3-3 AC/DC Disconnect Switch Positions
The following procedure is illustrated in Figure 3-4. If there will be more than one
PV string, label the positive and negative wire pairs appropriately (for example:
PV 1, PV 2).
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Connecting the DC Wiring
To wire the PV array to GT Inverter:
1. Install DC conduit from the PV string(s) to the GT Inverter wiring box,
through one of the knockout holes.
2. Remove the wiring box cover (see page 3–2).
3. Route the wires from the PV string(s) through the conduit and into the wiring
box.
4. Connect the DC Ground from each PV string to the GROUND bar in the
wiring box.
5. Connect the POSITIVE (+) wire from the #1 PV string to the
PV1 (+) terminal. Double check that the wire is in the proper location and
tighten the screw.
6. Connect the NEGATIVE (–) wire from the #1 PV string to the
PV1 (–) terminal. Double check that the wire is in the proper location and
tighten the screw.
7. Repeat for the #2 PV string, if there is one. Double check that the wires are in
the proper locations and tighten the screws:
a) Connect the POSITIVE (+) wire from the #2 PV string to the
PV2 (+) terminal.
b) Connect the NEGATIVE (–) wire from the #2 PV string to the
PV2 (–) terminal.
8. Ensure all connections are correctly wired and properly torqued according to
values shown in Table 3-1.
Table 3-1 Torque Values for Wires*
Wire Size
Torque
2
AWG
mm
in-lb
35
Nm
4.0
4.5
5.1
14 to 10
2.5 to 6.0
10.0
8
6
40
25.0
45
*Use copper conductors only.
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Wiring the Inverter
PV Array
PV String #2
G
–
+
G
G
–
PV String #1
+
Xantrex GT Inverter
Wiring Box
GND bar
AC/DC Disconnect
Switch
Figure 3-4 DC Connections for Grounded PV Array
Important: Depending upon installation and local codes, fusing and/or a combiner
box may be required. This fusing is to be provided by the installer.
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Connecting the AC Wiring
Connecting the AC Wiring
WARNING: Shock hazard
AC utility wiring to the GT Inverter unit is performed directly at the main breaker panel.
This should be done only by a qualified installer or electrician.
WARNING: Shock hazard
Before wiring the GT Inverter, ensure the main breaker in the primary utility breaker box
is switched OFF. Switch this breaker ON only after all wiring is completed as instructed in
the procedures.
Important: In the United States, the National Electrical Code (NEC) requires the
inverter to be connected to a dedicated circuit and no other outlets or devices may be
connected to this circuit. The NEC also imposes limitations on the size of the inverter and
the manner in which it is connected to the utility grid. The circuit breakers that are used in
the main panel that feed the inverter circuit must be for back-fed operation and labeled as
such.
The GT Inverter can be connected to a single bi-directional meter, or to dual
meters, where one meter indicates power used and the second meter indicates
power sold (power supplied back to the utility). Consult with the local utility to
determine the proper components to install, and obtain any permits required prior
to installation.
The following procedure is illustrated in Figure 3-5.
Important: Neutral conductor wiring is not required in this installation.
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Wiring the Inverter
To wire the main utility service panel to the GT Inverter:
1. Install conduit from the main utility service panel to the wiring box of the GT
Inverter. Run the two HOT wires (L1 and L2) and ground wire from the
service panel through the conduit and into the inverter wiring box.
2. Install or use an existing double-pole 20-Amp circuit breaker (or two
single-pole breakers, ganged) in the main utility service panel, and ensure that
the breakers are set to OFF.
3. Connect the ground wire (green or bare copper) from the ground bar in the
main utility service panel to the GND bar in the wiring box.
4. Connect the L1 HOT wire (black) from the double-pole breaker installed in
the main utility service panel, to the L1 GRID terminal in the wiring box.
5. Connect the L2 HOT wire (red) from the double-pole breaker installed in the
main utility service panel, to the L2 GRID terminal in the wiring box.
6. Ensure all connections are correctly wired and properly torqued according to
values shown in Table 3-1 on page 3–5.
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Connecting the AC Wiring
Utility Grid
L1 L2
Neutral
Utility
Meter
L1 L2
Neutral
Main Utility
Service Panel
Xantrex GT Inverter
Wiring Box
L2
L1
NEUTRAL
L1
L2
GND bar
Neutral
-to-
Ground
Bond
AC/DC Disconnect Switch
GROUND
G
Primary Earth
Ground
Figure 3-5 AC Connections from GT Inverter to Utility Service Panel
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Wiring the Inverter
Connecting Inverters in Parallel
GT Inverters can be connected in a parallel configuration for larger PV array
systems. In this configuration, separate solar arrays are required for each GT
Inverter unit. The output of each GT Inverter feeds a separate dual-pole 20-Amp
circuit breaker (L1 and L2) in the main utility service panel.
DC and AC Wiring for Inverters in Parallel
The following procedures are illustrated in Figure 3-6. The illustration and
instructions assume only two inverters, but in fact more than two inverters can be
used in a parallel configuration.
If there will be more than one PV string, label the positive and negative wire pairs
appropriately (for example: PV 1, PV 2).
Connecting DC
wiring
To wire the PV array to GT Inverters in parallel:
1. Install the DC conduit from the PV strings to the GT Inverter wiring boxes,
through appropriate knockout holes. Metal conduit is highly recommended.
2. Remove the wiring box cover (see page 3–2).
3. Route the wires from the PV string(s) through the conduit and into the wiring
box.
4. Connect the DC Ground from each PV array to the GND bar in the wiring
box.
5. Follow the instructions on page 3–4 for connecting POSITIVE (+) and
NEGATIVE (–) wires from each PV array to each GT Inverter.
6. Ensure all connections are correctly wired and properly torqued according to
values shown in Table 3-1 on page 3–5.
Connecting AC
wiring
To wire the main utility service panel to the GT Inverters in parallel:
1. Run conduit from the main utility service panel to the wiring boxes of the GT
Inverters.
2. Follow the instructions on page 3–7 for connecting L1 and L2 HOT wires and
ground wire from the main utility service panel to each GT Inverter.
3. Ensure all connections are correctly wired and properly torqued according to
values shown in Table 3-1 on page 3–5.
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Connecting Inverters in Parallel
Figure 3-6 Parallel GT Inverter DC and AC Wiring
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Wiring the Inverter
Communications Wiring for Inverters in Parallel
Communications wiring between GT Inverters mounted in parallel allows
information about each inverter and its associated PV array to be communicated
between all of the inverters in the system. Information about the entire system can
be displayed on any inverter LCD in the system.
For example, in a two-inverter system, if inverter #1 is producing 1500 W and
inverter #2 is producing 2000 W, both inverters display a total system power of
3500 W. The cumulative energy produced by both inverters that day is also
displayed.
You can still view information for an individual inverter in a system. See “To view
unit-specific screens in a multiple unit system:” on page 5–5.
Without communications wiring each inverter in a system will only display
information pertinent to the unit and its associated PV array.
Xanbus Network Technology
GT Inverters use Xanbus technology to communicate with other inverters in
parallel. Communications wiring between inverters is laid out in a “daisy chain”
pattern, each device on the network linked together with separate lengths of cable,
as shown in Figure 3-7.
For more information on installing a Xanbus network, see the Xanbus System
Installation Guide, available at www.xantrex.com.
Xanbus-enabled
Device 1
Xanbus-enabled
Device 2
Xanbus-enabled
Device 3
Terminator
Terminator
Figure 3-7 Daisy Chain Layout
CAUTION: Equipment damage
Connect only Xanbus-enabled devices.
Although the cabling and connectors used in this network system are the same as ethernet
connectors, this network is not an ethernet system. Equipment damage may result from
attempting to connect Xanbus to different systems.
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Communications Wiring for Inverters in Parallel
Terminators
Male network terminators (Figure 3-8) are required at both ends of the network to
ensure the communication signal quality on the network.
Figure 3-8 Male Network Terminator
GT Inverter Xanbus
Ports
Two RJ45 ports are provided in the GT Inverter, accessible from the wiring box.
See Figure 3-9 for the location of these ports.
RJ11 ports
(not used)
RJ45
Xanbus ports
RS-232 port (used to connect a PC to use the GUI.
See “Custom Screens” on page 5–9)
Male network terminator
Figure 3-9 Xanbus RJ45 Ports in the GT Inverter Wiring Box
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Wiring the Inverter
Cabling Requirements
CAUTION: Equipment damage
Do not use crossover cable in a Xanbus system.
The network uses Category 5 (CAT 5) cable, a standard cable available from any
computer supply store. The cable consists of eight conductors in four twisted pairs
with an RJ45 modular connector wired to the T568A standard. Table 3-2 contains
the arrangements of wire colors to pin numbers for the T568A standard.
Table 3-2 T568A Standard Wiring
Pin Number Conductor Name CAT 5 Cable Insulation Color
1
2
3
4
5
6
7
8
NET_S
NET_S
NET_C
CAN_L
CAN_H
NET_C
NET_S
NET_C
White/Green
Green
White/Orange
Blue
White/Blue
Orange
White/Brown
Brown
RJ45 Connector Requirements
The network cable uses modular RJ45 connectors, as shown in Figure 3-10. The
connector is suitable for cost-sensitive applications and is easily installed. The
RJ45 connector should be a modular plug, 8-position, 8-contact for round,
stranded, unshielded cable.
Figure 3-10 RJ45 Connector
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Communications Wiring for Inverters in Parallel
Purchasing Network Components
Consult with your system designer to determine what network components will be
needed for your specific installation. Table 3-3 provides a partial list of network
components and part numbers. Pre-made cables are available in standard lengths
from 3 feet to 75 feet.
Call your dealer or visit www.xantrex.com to purchase network components.
Table 3-3 Network Components and Part Numbers
Network termination — Male (2 per pack)
Network cable 3 ft. (0.9 m)
809-0901
809-0935
809-0936
809-0937
809-0938
809-0939
809-0940
809-0941
809-0942
Network cable 5 feet (1.5 m)
Network cable 7 feet (2.0 m)
Network cable 10 feet (3.0 m)
Network cable 14 feet (4.3 m)
Network cable 25 feet (7.6 m)
Network cable 50 feet (15.2 m)
Network cable 75 feet (22.9 m)
Guidelines for Routing the Network Cables
WARNING: Shock hazard
Do not route the network cables in the same conduit or panel as the AC and DC power
cabling.
:
To ensure maximum performance of your network, follow these guidelines when
routing the network cables. Route the cables before installing Xanbus-enabled
devices.
•
Route the cables away from sharp edges that might damage the insulation.
Avoid sharp bends in the cable—no less than a 10-cm (4-inch) radius.
•
•
•
Allow for some slack in the cable tension.
Keep the alignment of wire pairs inside the sheath as straight as possible.
Allow separation between data and power cables (data cables should only
cross a power cable at right angles).
•
Do not staple the cable with metal cable staples. Use the appropriate hardware
fasteners to avoid damage to the cable.
CAUTION: Unpredictable device behavior
Do not connect one end of the network to the other to make a ring.
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Wiring the Inverter
Connect the Communications Cable between Inverters in Parallel
WARNING: Shock hazard
If the inverter is already installed and operational, turn OFF the breaker switches in the
main utility service panel and the AC/DC Disconnect switch on the inverter wiring box
before performing this procedure.
WARNING: Shock hazard
Hazardous voltages may be present when cover is removed. After disconnecting all
sources of energy, wait 5 minutes before removing cover.
The following procedure is illustrated in Figure 3-11 on page 3–17. The
illustration and procedure assume only two inverters connected in parallel.
However, there can be more than two inverters wired in this configuration.
To provide communication between inverters mounted in parallel:
1. Remove the wiring box cover from each unit.
2. On each unit, remove the plug from a 1.9 cm (3/4”) side conduit hole and
install appropriate conduit between the two units.
3. Connect the communication cable to any RJ45 port in Inverter #1.
4. Pass the cable through the conduit between Inverter #1 and Inverter #2.
Inside each unit’s wiring box, ensure the communication cable runs
horizontally along the flat-bottomed channel formed when the insulation
barrier is in place. The cable should run on top of the insulation barrier and
out the side conduit hole, avoiding any contact with the AC and DC wiring.
5. Connect the communication cable to any RJ45 port in Inverter #2.
6. For more than two inverters in parallel, continue connecting cable as
described above.
7. Insert male network terminators into the empty RJ45 ports in the inverters at
the beginning and end of the network. There should be no empty RJ45 ports.
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Communications Wiring for Inverters in Parallel
PV Array #2
G
–
+
PV Array #1
G
–
+
Communications cable
in separate conduit from AC and DC wiring.
Xantrex GT Inverter #2
Wiring Box
Xantrex GT Inverter #1
Wiring Box
Male Terminator
MaleTerminator
GND
bar
GND bar
AC/DC Disconnect
Switch
AC/DC Disconnect
Switch
L2
G
L1
G
L2
L1
To Utility Service Panel. See
Figure 3-6 on page 3–11 for
details of wiring connections.
Figure 3-11 Communications Wiring for GT Inverters in Parallel
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Starting the Inverter
4
Chapter 4, “Starting the Inverter”, contains information on starting up
the Xantrex Grid Tie Solar Inverter and performing a Functional Test.
The topics in this chapter are organized as follows:
• “Startup Procedure” on page 4–2
• “Replacing the Wiring Box Cover” on page 4–3.
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Starting the Inverter
Startup Procedure
Starting up the GT Inverter requires several steps. You will need to:
1. Ensure the AC/DC Disconnect switch located on the bottom of the GT
Inverter unit is in the OFF position (see Figure 4-1).
2. Check the PV array DC voltage (see procedure below).
3. Check the AC utility voltage (see procedure below).
4. Replace the cover on the wiring box (see “Replacing the Wiring Box Cover”
on page 4–3).
5. Start up the GT Inverter by switching the AC/DC Disconnect switch ON.
WARNING: Shock hazard
Hazardous voltages are present from two sources. Use extreme caution during startup
procedure. Before applying power to the GT Inverter, ensure all AC and DC wiring is
correct.
Checking the PV Array DC Voltage
To check the PV array DC voltage:
1. Uncover the PV arrays and expose them to full sunlight. The sunlight must be
intense enough to produce the required output voltage.
2. Measure the PV array open circuit DC voltage across the DC positive (+) and
negative (–) terminals. This voltage must be greater than 150 volts DC to
energize the electronics.
Checking the AC Utility Voltage
To check the AC utility voltage:
1. Switch on the main and inverter breakers in the main electrical service panel.
2. Using an AC voltmeter, measure the AC open circuit utility voltage between
L1 and L2. Ensure this voltage is at approximately the nominal value. The
inverter operates with a line-to-line voltage (L1 to L2) range around the
nominal value.
See “Output” on page A–2 for the operating utility voltage range for the GT
Inverter.
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Replacing the Wiring Box Cover
Replacing the Wiring Box Cover
After performing the voltage checks, replace all covers that were removed during
installation and startup.
WARNING: Shock hazard
Before reattaching covers, turn OFF the breaker switches in the main utility service panel
and the AC/DC Disconnect switch on the GT Inverter.
If the front panel cover was removed from the GT Inverter, then it must be
replaced before the wiring box cover is replaced.
To replace the front panel cover:
1. Place the cover in position on the front panel, being careful not to pinch any
wires. The fan wires should pass through the notch in the upper edge of the
front panel cover.
2. Ensure that the two screw holes in the bottom of the front panel cover are
aligned with the corresponding holes in the bottom of the inverter (not the
wiring box).
3. Replace the two screws removed when the cover was removed (see
“Installing the Fan Assembly” on page 2–23), and tighten securely.
To replace the wiring box cover:
1. Place the cover in position on the wiring box, being careful not to pinch any
wires in the wiring box.
2. Ensure that the two screw holes in the bottom of the wiring box cover are
aligned with the corresponding holes in the bottom of the wiring box.
3. Replace the two screws removed when the cover was removed (see
“Accessing the Wiring Terminals” on page 3–2), and tighten securely.
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Starting the Inverter
Starting up the GT Inverter
To start up the inverter:
1. Switch the AC/DC Disconnect switch to the ON position (see Figure 4-1).
2. Check the GT Inverter LCD. The startup screens (see Table 5-1 on page 5–3)
should appear for five seconds each, and then the “Reconnecting in sss
seconds” special screen (see Table 5-10 on page 5–8) will appear until the
five-minute, five-second (default value) protection timer countdown is
completed.
AC/DC Disconnect Switch
Figure 4-1 AC/DC Disconnect Switch Positions
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Monitoring the Inverter
5
Chapter 5, “Monitoring the Inverter”, contains information for
understanding the LCD screens and the LED indicators.
The topics in this chapter are organized as follows:
• “Monitoring the Front Panel Display” on page 5–2
• “Front Panel Display Screens and What They Mean” on page 5–3
• “Status Indicator Lights” on page 5–9.
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Monitoring the Inverter
Monitoring the Front Panel Display
During startup
During startup, the inverter’s front panel LCD (see Figure 5-1) shows the first
three screens described in Table 5-1, “Startup Screens on GT Inverter Front Panel
Display” on page 5–3.
During waiting
period
When the five-minute, five-second (305 seconds) protection timer begins, the
inverter displays “Reconnecting in sss seconds” (see Table 5-10, “Special
Message Screens” on page 5–8).
During operation
When the protection timer stops, the GT Inverter begins selling power, indicated
by the power output reading in the display (see Table 5-2, “Normal Operation
Default Screen” on page 5–4).
When the inverter is
offline or there is
fault condition
When the GT Inverter is offline (e.g., at night) or a fault condition has been
detected, the LCD shows a message screen to indicate that state. The specific fault
condition will be identified. See Table 5-5, “Offline Mode Default Display” on
page 5–5 and Table 5-8, “Fault Message Screens” on page 5–7.
Important: The values in the front panel LCD are not user adjustable.
Tap Xantrex logo for
Front panel LCD
backlight/status screens.
Figure 5-1 Front Panel LCD Location
Viewing more
information
Additional screens of information about the performance of the GT Inverter can be
displayed by tapping the Xantrex logo on the inverter front panel. This causes the
LCD to cycle through a series of information screens in Normal Operation,
Offline or Fault modes. These are described in detail in the following section,
“Front Panel Display Screens and What They Mean”.
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Front Panel Display Screens and What They Mean
Front Panel Display Screens and What They Mean
The front panel display shows different message screens during different modes of
operation (Startup, Normal, Offline, and Fault). All single units display a basic set
of message screens; multiple unit systems display additional screens in Normal
Operation and Offline modes.
In addition there are Special message screens that may appear in any operational
mode. All of these message screens are described in more detail in the following
tables.
Startup Mode
During startup, the GT Inverter displays three message screens on its front panel
LCD. These screens appear in the following order (Table 5-1).
Table 5-1 Startup Screens on GT Inverter Front Panel Display
Display*
Duration
Description
5 sec.
Startup message 1: Inverter name and model
number
5 sec
5 sec
Startup message 2: Model and revision
numbers for Flash and ROM memory on the GT
Inverter. The ROM revision number applies to
the protection processor.
Startup message 3: Anti-islanding Utility Grid
trip points.
Vh: high voltage threshold
Vl: low voltage threshold
Fh: high frequency threshold
Fl: low frequency threshold
* all numbers in this and following tables are examples only.
The five-minute, five second protection timer begins its countdown during startup
and the “Reconnecting in sss seconds” screen appears until the timer countdown is
complete.
Normal Operation Mode
The LCD on the GT Inverter is refreshed every two seconds, so all readings are
current to within two seconds. There is a default display available at all times, and
a series of additional screens that can be displayed by tapping the Xantrex logo
near the LCD to change the display.
Normal Operation
default display
After the protection timer has completed its countdown and during normal
operation, the GT Inverter displays the normal operation message screen shown in
Table 5-2.
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Monitoring the Inverter
Table 5-2 Normal Operation Default Screen
Display
Description
Power being produced by the system now.
Cumulative energy produced by the system today.
If there is sufficient energy from the PV array, this screen is displayed
continuously while the system is operating normally. In a multiple unit system
with communications cables properly connected, the power and cumulative
energy values displayed are for the entire system.
During low light conditions when the GT Inverter cannot produce any power, the
Normal Operation default screen flashes alternately (every two seconds) with the
Insufficient Solar Energy screen (see Table 5-10, “Special Message Screens” on
page 5–8).
More screens for all
systems
Besides the default normal operation display, more system information messages
can be viewed.
To view more Normal Operation information:
•
Tap the Xantrex logo near the LCD to advance the display to the next screen.
Normal operation screens shown in Table 5-3 are displayed in the order given,
as you tap successively on the unit. They are common to all GT Inverter
systems, no matter how many units are installed.
If you continue to tap the unit, then the LCD continues to cycle through all of the
available normal operation screens. Each screen is displayed for a maximum of
30 seconds. If you do not tap again during that time period, then the LCD
backlight turns off and the display reverts to the default system message screen.
Table 5-3 Normal Operation Screens for All GT Inverter Units
Tap
Display*
Description
1st time
LCD backlight turns on for better readability
and default Normal Operation screen is
displayed.
2nd time
3rd time
4th time
5th time
Lifetime energy produced by the GT Inverter
system.
Length of time inverter has been online today, in
hours (hh), minutes (mm) and seconds (ss).
Immediate DC voltage and current readings
from the PV array.
Immediate AC voltage and frequency readings
from the Grid
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Front Panel Display Screens and What They Mean
* In a multiple unit system with communications cables properly installed, the
system values displayed are for the entire system. For example, in a
two-inverter system, if inverter #1 is producing 1500 W and inverter #2 is
producing 2000 W, both inverters display a total system power of 3500 W.
Time online and array readings are for the local inverter and PV array
associated with that inverter.
Additional
In addition, to the normal system message screens, additional screens specific to
each GT Inverter unit can be displayed when the unit is networked to other GT
Inverters. These screens are only available on multiple unit systems.
messages for
multiple unit
systems only
To view unit-specific screens in a multiple unit system:
1. Tap the Xantrex logo near the LCD to advance the display to the next screen.
Continue tapping until the final system message screen (“Grid Readings”, in
Table 5-3 above) is displayed.
2. Tap again. Normal operation screens shown in Table 5-4 are displayed in the
order given, as you tap successively on the unit.
If you continue to tap the unit, then the LCD will cycle through all of the available
normal operation screens. Each message is displayed for up to 30 seconds. If you
do not tap again within that time period, then the LCD backlight turns off and the
display reverts to the default normal operation screen (Table 5-2).
Table 5-4 Additional Normal Operation Screens for Each GT Inverter Unit in a
Multiple Unit System
Tap
Display
Description
6th time
Power being produced by this unit now.
Cumulative energy produced by this unit today.
7th time
Lifetime energy produced by this GT Inverter unit
Offline Mode
Offline default
display
At night and when no power is being produced by the PV array (offline mode), the
GT Inverter displays the screen shown in Table 5-5.
Table 5-5 Offline Mode Default Display
Display
Description
Displayed at all times while the system is offline.
Offline messages
for all systems
Additional message screens can be viewed when the system is offline by tapping
the Xantrex logo near the LCD. Each additional tap displays the next screen, in
the order shown in Table 5-6.
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Monitoring the Inverter
These message screens are common to all GT Inverter systems, no matter how
many units are installed. If you continue to tap the unit, then the LCD will
continue to cycle through all of the available offline mode screens.
Table 5-6 Offline Mode Screens for All GT Inverter Units
Tap
Display*
Description
1st time
LCD back light turns on for better readability
and default Offline Mode screen is displayed.
2nd time
Power being produced by the system now.
Cumulative energy produced by the system
today.
3rd time
4th time
Lifetime energy produced by the system.
Total time that the system was online today, in
hours (hh), minutes (mm) and seconds (ss).
* In a multiple unit system with communications cables properly installed, the
system values displayed are for the entire system. Time online is for the local
inverter.
Additional Offline
messages for
multiple unit
systems
Multiple unit systems in offline mode display all of the message screens shown in
Table 5-6, plus the additional screens shown in Table 5-7. These additional
screens are displayed following the “Time Online” screen.
These screens are only displayed on multiple unit GT Inverter systems with
communications cabling properly installed. If you continue to tap the unit, then
the LCD continues to cycle through all of the available offline mode screens.
Table 5-7 Additional Offline Mode Screens for Each GT Inverter Unit in a
Multiple Unit System
Tap
Display
Description
5th time
Power being produced by this unit now.
Cumulative energy produced by this unit today.
6th time
Lifetime energy produced by this unit.
Fault Mode
When a fault state is detected, the appropriate fault message appears on the front
panel display at the next screen refresh (i.e., within 2 seconds). The GT Inverter
fault message screens are shown in Table 5-8.
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Front Panel Display Screens and What They Mean
Fault Mode causes
These message screens only appear when there is a fault, and then flash
alternately with the Inverter Offline default screen (Table 5-5) until the fault is
corrected.
Table 5-8 Fault Message Screens
Display
Description
When the actual DC voltage is over or under the allowable
range, 165 to 600 Vdc. Self-clearing, no action required.
The PV array should be configured such that DC voltage
does not fall below 195 Vdc or rise above 600 Vdc.*
When the actual AC voltage is over or under the allowable
range, as specified in “Output” on page A–2.
This is a utility fault; it will clear itself when the AC voltage
comes within the specified range.†
When the actual Frequency is over or under the allowable
range, as specified in “Output” on page A–2. This is a utility
fault; it will clear itself when the frequency comes within the
specified range.
When the unit’s internal temperature is greater than 80° C
(176° F), the unit will shut down automatically and only
restart when the temperature has dropped to less than 70° C
(158° F).
When a grounding fault is detected. The ground fault fuse
will be blown. The system must be shut down completely,
the fault corrected, the fuse replaced (see “Replacing the
Ground Fault Protection Fuse” on page 6–4) and then the
system restarted. Troubleshooting a grounding fault should
be performed by qualified personnel.
Applicable only in German installations.
Appears if the GT Inverter unit has been shut down via a
computer connected to the RS-232 port.
The protection processor is not responding.
* It is normal to receive this fault during low light conditions at dawn or dusk. At
such times, the array does not have sufficient energy to power the inverter, so
the PV voltage drops below 165 volts occasionally.
† Grid fault. When this fault is cleared the protection timer will begin its
countdown and you will see the “Reconnecting in sss seconds” and “Inverter
Offline” special screens (see Table 5-10) flashing alternately until the
countdown is complete.
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Monitoring the Inverter
Additional Fault
messages for all
systems
Additional message screens can be viewed in fault mode by tapping the Xantrex
logo near the LCD. Each additional tap displays the next screen in the order
shown in Table 5-9.
Table 5-9 Additional Fault Mode Screens
Tap
Display*
Description
1st time
Current fault message LCD backlight turns on for better readability.
screen (see Table 5-8)
2nd time
Energy being produced by the system now.
Cumulative energy produced by the system
today.
3rd time
4th time
5th time
6th time
Lifetime energy produced by the GT Inverter
system.
Length of time inverter was online today, in
hours (hh), minutes (mm) and seconds (ss).
Immediate DC voltage and current readings of
power from the PV array.
Immediate AC voltage and frequency readings
of power from the Grid.
* In a multiple unit system with communications cables properly installed, the
system values displayed are for the entire system. Time online and array
readings are for the local inverter and PV array associated with that inverter.
Special Screens
Special message screens are displayed in specific situations that are not
considered fault situations. They can appear in any mode of operation. These
screens are described in Table 5-10.
Table 5-10 Special Message Screens
Display
Description
Time remaining in seconds (sss) before the GT Inverter
reconnects to the Grid. This is a protection timer; it runs for
approximately five minutes at startup and after any Grid fault.
GT Inverter switching (or has switched) from Normal
Operation to Offline mode. This screen may flash alternately
with a Fault message screen.
5–8
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Status Indicator Lights
Table 5-10 Special Message Screens
Display
Description
The “ ” in these two screens (see Table 5-2 and Table 5-4)
indicates that the unit is derating its output power because the
inverter heat sink temperature is above 75° C (167° F).
The asterisk only appears when the power is actually being
limited by the inverter.
Indicates the GT Inverter is not producing power due to
insufficient solar energy during low light conditions in early
morning or late afternoon or when the PV array is in shade.
This screen flashes alternately with the Normal Operation
default screen.
Custom Screens
Two custom screens are available. The inverter does not display them unless they
are configured using a computer connected to the RS-232 port inside the wiring
box. If programmed, the custom screens display as the fourth and fifth screens
during the startup sequence. They can also be viewed by tapping the unit during
normal operation and fault mode.
The first custom screen is intended for the home owner to display information
such as the name or location of the PV array associated with the inverter.
The second custom screen is intended for installers, who can configure the screen
to display, for example, contact information for service.
A PC graphical user interface that can be used for configuring custom screens is
available for download at www.xantrex.com.
Status Indicator Lights
The GT Inverter is equipped with two status indicator lights (LEDs) located below
the front panel LCD (Figure 5-2). These LEDs indicate the inverter’s current
status (Table 5-11) and assist in troubleshooting the performance of the unit.
Only one indicator light will be lit at any time.
Table 5-11 Status Indicator LEDs
GREEN
GT Inverter is on (DC voltage and AC voltage are qualified and the
protection timer has finished) and delivering energy to the grid. No
action required. Turns off when a fault state is detected.
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Monitoring the Inverter
Table 5-11 Status Indicator LEDs
RED
Ground fault condition detected.
Check for any fault messages on the display (see Table 5-8), and refer
also to Table 6-1, “Troubleshooting the GT Inverter” on page 6–8 to
resolve the fault condition.
Green LED
Red LED
Figure 5-2 Location of Status Indicator Lights
5–10
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Maintenance and
Troubleshooting
6
Chapter 6, “Maintenance and Troubleshooting”, contains information
about how to provide general maintenance for the Xantrex Grid Tie
Solar Inverter. It also provides information about troubleshooting the
unit.
The topics in this chapter are organized as follows:
• “Factors Affecting GT Inverter Performance” on page 6–2
• “Performing General Maintenance” on page 6–3
• “Replacing Parts” on page 6–3
• “Identifying Error/Fault Conditions and Solutions” on page 6–8.
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Maintenance and Troubleshooting
Factors Affecting GT Inverter Performance
This section describes several factors that will affect the amount of power that a
properly installed and operating GT Inverter can produce.
PV Array Factors
PV array ratings
PV arrays are rated at ideal factory conditions, such as specified illumination
(1000 W/m ), spectrum of the light and specified temperature (25°C / 77°F),
2
which seldom reflect real-world installations. This is called the STC (Standard
Test Condition) rating and is the figure that appears on the PV module nameplate
label.
Expected
performance
Because of several unavoidable environmental factors, you can expect your
PV array to produce around 60% to 70% of its peak STC-rated output for a
properly designed and installed PV system on a typical day.
Temperature and
reduced output
PV array temperature affects the output of the entire system. As the temperature
on the array surface heats up, its energy output goes down. Roof-mounted arrays
also collect the heat generated by the roof surface (or trapped under the array) and
will produce less output than pole-mounted arrays, which allow greater air
circulation behind the panels.
Important: The GT Inverter will reduce its energy output to protect its electronic
circuits from overheating and possible damage in high heat conditions. For maximum
output in hot climates, mount the GT Inverter in a shaded location with good air flow.
Angle of the sun
The angle of the sun in relation to the PV array surface—the array
orientation—can dramatically affect the PV array output. The array energy output
will vary depending on the time of day and time of year as the sun’s angle in
relation to the array changes. Sunlight output decreases as the sun approaches the
horizons (such as in winter in North America) due to the greater atmospheric air
mass it must penetrate, reducing both the light intensity that strikes the array’s
surface and spectrum of the light. In general, you can expect only four to six hours
of direct sunlight per day.
Partial shade
Shading of only a single module of the array will reduce the output of the entire
system. Such shading can be caused by something as simple as the shadow of a
utility wire or tree branch on part of the array’s surface. This condition, in effect,
acts like a weak battery in a flashlight, reducing the total output, even though the
other batteries are good. However, the output loss is not proportionate to shading.
The GT Inverter is designed to maximize its energy production in all of the above
situations using its MPPT algorithm.
6–2
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Performing General Maintenance
Other Factors
Other factors that contribute to system losses are:
•
•
•
Dust or dirt on the array
Fog or smog
Mismatched PV array modules, with slight inconsistencies in performance
from one module to another.
•
•
•
Inverter efficiency
Wire losses
Utility grid voltage.
For additional information and technical notes concerning PV array performance,
please visit our Web site at www.xantrex.com.
Performing General Maintenance
Follow these simple routines to ensure many years of service and optimal
performance of your solar energy system.
1. Keep the heatsink clear of dust and debris.
WARNING: Shock and fire hazard
Do not use a pressure washer to clean the GT Inverter, or use other cleaning methods that
could allow water to enter the unit.
2. Clean the PV array, during the cool part of the day, whenever it is visibly
dirty.
3. Periodically inspect the system to make sure that all wiring and supports are
securely in place.
4. On a sunny day near noon on March 21 and September 21 of each year,
review the output of the system and compare with previous year’s reading.
Maintain a log of system performance readings so that you can recognize
when system performance becomes inconsistent.
Replacing Parts
WARNING: Shock hazard
There are no user-replaceable parts on the GT Inverter. Do not attempt to service the unit
yourself.
See the “Warranty and Return Information” on page WA–1 for information on
how to get service for your GT Inverter.
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Maintenance and Troubleshooting
Replacing the Ground Fault Protection Fuse
WARNING: Shock and fire hazard
Fuses should only be replaced by qualified service personnel. For continued protection
against risk of fire, replace only with same type and ratings of fuse.
WARNING: Shock hazard
After disconnecting both AC and DC power from the GT Inverter, wait five minutes
before attempting any maintenance or cleaning or working on any circuits connected to
the inverter. Internal capacitors remain charged for five minutes after disconnecting all
sources of power.
WARNING: Shock hazard
Dangerous voltages can exist inside the inverter. If there is leakage current from the
POSITIVE PV lead to ground at the array, touching the NEGATIVE PV lead could cause
a life-threatening shock even with the disconnect switch turned off. Ungrounded negative
DC current on the PV NEGATIVE (–) wire presents an extreme shock hazard.
When the fuse has blown due to a fault, incorrect handling can be life-threatening. Use an
insulated fuse puller.
If possible, cover PV arrays with an opaque material during this procedure.
The ground fault protection fuse will blow when severe leakage occurs between
the PV array and earth ground, or when the system has been installed with faulty
wiring. Before replacing the fuse, it is important to have qualified service
personnel determine the cause of the ground fault.
To replace a ground fault protection fuse:
1. Remove the wiring box and front panel covers (described on page 2–23 and
page 3–2). The ground fault protection fuse is located on the left side of the
LCD panel, behind the front panel cover (Figure 6-1).
2. Using an insulated fuse puller, remove the blown fuse and replace it with a
new AC/DC midget cartridge, rated 600 Vdc, 1A (Littelfuse KLKD 1 or
equivalent).
3. Replace the front panel and wiring box covers (described on page 2–23 and
page 4–3).
6–4
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Replacing Parts
Ground Fault
LCD
Protection Fuse
Figure 6-1 Location of Fuse, Front Panel Cover Removed
Replacing the Inverter
You can swap out the inverter and replace it with another GT Inverter, leaving the
existing wiring box in place. This means that you do not have to disturb wiring
connections in the wiring box. However, you do have to disconnect wiring
between the inverter and the wiring box.
WARNING: Shock hazard
Separating the inverter from the wiring box breaks the ground path between PV
NEGATIVE (–) and earth ground. When the wires between the inverter and wiring box
are disconnected and exposed, both PV leads are floating at the array open circuit voltage.
If there is leakage current from the POSITIVE PV lead to ground at the array, touching the
NEGATIVE PV lead could cause a life-threatening shock even with the disconnect switch
turned off. Ungrounded negative DC current on the PV NEGATIVE (–) wire presents an
extreme shock hazard.
Use insulated tools only when disconnecting wires between the inverter and wiring box.
Cap all disconnected wires with wire nuts.
If possible, cover PV arrays with an opaque material during this procedure.
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Maintenance and Troubleshooting
Recommended tools:
•
•
•
Insulated screwdriver
Wire nut for PV NEGATIVE (–) wire
7 mm socket and small ratchet, or 7 mm open wrench.
WARNING: Shock hazard
The inverter should only be removed from the wiring box when a replacement inverter is
immediately available. When replacing an inverter, ensure the AC/DC Disconnect switch
is locked (or otherwise secured) in the OFF position. Do not leave the top of the wiring
box exposed for extended periods of time.
i
WARNING: Shock hazard
Before replacing the inverter, turn OFF the breaker switches in the main utility service
panel and the AC/DC Disconnect switch on the GT Inverter.
To remove the inverter from the wiring box:
1. Turn OFF the breaker switches in the main utility service panel and the
AC/DC Disconnect switch on the GT Inverter. If possible, cover the PV arrays
with an opaque material.
2. Remove the covers from the wiring box and inverter front (described on
page 2–23 and page 3–2).
3. Using an insulated screwdriver, disconnect the PV NEGATIVE (–) wire from
the terminal block inside the inverter. Cap the wire immediately with a wire nut.
4. Disconnect the remaining AC, DC and communications wires between the
inverter and the wiring box, inside the inverter. Cap all disconnected AC and
DC wires with wire nuts.
5. Inside the inverter, remove the four nuts attaching the wiring box to the
inverter.
6. Lift the inverter off the mounting bracket, leaving the wiring box in place.
6–6
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Replacing Parts
Front view
Back view
Inverter
Lower flange
behind wiring box
Wiring box
Figure 6-2 Inverter and Wiring Box Sections
To replace the inverter on the wiring box:
1. If it has not already been removed, remove the front panel cover on the
inverter now. The wiring box cover should have been removed in the previous
procedure.
2. Mount the inverter on the upper mounting bracket above the wiring box, with
the lower flange behind the wiring box.
3. Replace the nuts that connect the inverter and the wiring box. Secure all nuts
tightly.
4. Remove the wire nut from the PV NEGATIVE (–) wire and reconnect it to the
terminal block inside the inverter.
5. Uncap the remaining DC and AC wires and reconnect them to the terminal
block inside the inverter.
6. Replace the front panel and wiring box covers (described on page 2–23 and
page 4–3).
7. Turn ON the breaker switches in the main utility service panel and the AC/DC
Disconnect switch on the GT Inverter.
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Maintenance and Troubleshooting
Identifying Error/Fault Conditions and Solutions
Most error or fault conditions will be identified by fault message screens on the
GT Inverter front panel LCD. These are described in the “Fault Mode” section on
page 5–6 of this manual. Most of these fault conditions are self-correcting and
require no user action to remedy.
See “Front Panel Display Screens and What They Mean” on page 5–3 for more
information.
Table 6-1 is intended to assist in determining fault conditions that may require
user action to remedy.
Table 6-1 Troubleshooting the GT Inverter
•
The inverter LED
AC/DC Disconnect Switch Turn on AC/DC Disconnect Switch and breakers in the
indicator lights do not is off, or utilty service
sequence described in “Startup Procedure” on page 4–2.
illuminate, and the
inverter does not
operate in sufficient
sunlight
The display reads
“Inverter Offline”
The Vdc reading is 0.
panel AC or DC breakers
are switched off.
No AC grid or DC array
voltage is present.
Check source of the AC voltage. Ensure that the inverter
AC/DC Disconnect Switch is set ON.
•
•
Check AC connections and ensure AC voltage within the
range specified in “Output” on page A–2 is present.
Check DC connections. Check the DC voltage on the
positive and negative input terminalsand ensure
195–550 Vdc is present.
Check for incorrectly wired PV arrays or try again on a
day with brighter sunlight intensity.
Only the inverter RED
LED is illuminated.
Ground fault condition
detected.
Check for any fault messages on the display (see
Table 5-8 on page 5–7). System should be checked by a
qualified electrician and repaired.
6–8
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Specifications
A
Appendix A, “Specifications”, contains information about the
electrical and environmental specifications of the Xantrex Grid Tie
Solar Inverter.
The topics in this appendix are organized as follows:
• “Electrical Specifications” on page A–2
• “Environmental Specifications” on page A–5
• “Mechanical Specifications” on page A–5
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Specifications
Electrical Specifications
Input
Input voltage, Maximum Power Point range
Absolute maximum array open circuit voltage
Maximum input current
195 to 550 Vdc
600 Vdc
16.6 A DC
Maximum array short circuit current
Recommended PV array power
Reverse polarity protection
19 A DC
Up to 3300 W
Short circuit diode
Ground fault protection
GF detection, I
> 1 A
DIF
Output
GT3.0 North American
3000 W AC
2500 W AC
20 A
GT3.0 European
3000 W AC
2500 W AC
20 A
Maximum output power
Nominal output power over rated temp range
Maximum utility backfeed current
Nominal output voltage
240 V
230 V
Operating range, utility voltage (default)*
Nominal output frequency
211 to 264 Vac
60 Hz
202 to 253 Vac
50 Hz
Operating range, utility frequency (default)*
Maximum continuous output current
Output overcurrent protection
Total Harmonic Distortion (THD)
Power factor
59.3 to 60.5 Hz
14.2 A
47.1 to 50.9 Hz
14.9 A
20 A RMS
<5%
20 A RMS
<5%
>0.9
>0.9
Utility monitoring—islanding protection
Output characteristics
Vac, fac as per UL1741
Current source
Sine wave
Output current waveform
*
Requires Utility permission and qualified service personnel to change settings.
A–2
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Electrical Specifications
Adjustable Disconnect Settings
The adjustable disconnect setting values vary depending on whether the inverter is
a 208 Vac/60 Hz, 240 Vac/60 Hz, or 230 Vac/50 Hz model. Utility permission is
required prior to changing the settings on the inverter.
The default values of these settings differ from the utility specifications on
page A–2. These differences take into account the accuracy ranges listed in the
table below, and are intended to ensure that utility specifications are always met.
Default Values
Adjustment Range
Setting
208 Vac/60 Hz 240 Vac/60 Hz 230 Vac/50 Hz
From...
To...
269 Vac
Accuracy
AC Low Voltage
AC High Voltage
AC Low Frequency
AC High Frequency
Reconnect Delay
186 Vac
225 Vac
214 Vac
261 Vac
205 Vac
250 Vac
47.1 Hz
50.9 Hz
180 Vac
+/– 3 Vac
59.4 Hz
60.4 Hz
46.0 Hz
60 sec.
62.0 Hz
600 sec.
+/– 0.1 Hz
+/– 5 sec.
305 sec.
Output Power Versus Ambient Temperature
Once the heat sink on the inverter reaches a maximum temperature limit, the GT
Inverter reduces its energy output to ensure maximum component ratings are not
exceeded.
GT3.0 GRID TIE SOLAR INVERTER
Output Power versus Ambient Temperature
3500
3000
2500
2000
1500
1000
500
0
-25
-15
-5
5
15
25
35
45
55
65
Ambient Temperature (C)
Standard Unit
w/ Optional Fan Kit
Figure A-1 Output Power vs. Ambient Temperature
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Specifications
Efficiency
Maximum efficiency
94.6%
94.5%
Efficiency at 75% of nominal
output power rating
Euro efficiency
93.3%
1 W
Nighttime tare loss
TYPICAL EFFICIENCY [%]
at 195VDC, 240VAC, 25C
100
90
80
70
60
50
0
500
1000
1500
2000
2500
3000
Output Power (W)
Figure A-2 Typical Efficiency
A–4
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Environmental Specifications
Environmental Specifications
Rated operating temperature range
-25° to +45° C (-13° to +113° F)
Tolerable operating temperature
range
-25° to +65° C (-13° to +149° F)
Storage temperature range
Power derating
-40° to +85° C (-40° to +185° F)
Derating curve above +45° C (+113° F);
see Figure A-1 on page A–3
Tolerable relative humidity limit
Operating: 100% condensing
Storage: <95%, non-condensing
User Display
Type
alphanumeric liquid crystal
2 lines by 16 characters
Size
Backlight
yes
Display Accuracy
Instantaneous Power
Voltage
+/- (30 W + 1% of reading)
+/- (1% of rating + 1% of reading)
+/- (1% of rating + 1% of reading)
+/- 5%
Current
System Lifetime energy
Mechanical Specifications
Outdoor enclosure
NEMA 3R, Rainproof
Inverter dimensions
72.5 × 40.3 × 14.6 cm (28.5 × 15.9 × 5.7 inches)
(H × W × D)
Shipping dimensions
86.6 × 51.8 × 26.2 cm (34 × 20.4 × 10.3 inches)
(H × W × D)
Inverter weight
20.4 kg (45 lb)
Shipping weight
26.6 kg (58.7 lb)
2
Input and output terminals
AC and DC terminals accept wire sizes of 2.5 to 25 mm
(#14 to #6 AWG)
Disconnect switch
Integrated switch, disconnects both AC and DC (meets
NEC article 690), rated @ 600 Vdc
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Specifications
Accessories
GT Fan Kit (includes fan assembly and heat sink cover)
Part number
Fan control
864-0201
Thermal, activates when the internal surface of the heat sink
reaches 60° C (140° F).
Fan power consumption 3.84 W
(operating)
A–6
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Warranty and Return Information
Warranty
What does this warranty cover? This Limited Warranty is provided by Xantrex Technology, Inc. ("Xantrex")
and covers defects in workmanship and materials in your Xantrex Grid Tie Solar Inverter. This warranty period lasts
for five year from the date of purchase at the point of sale to you, the original end user customer. You require proof of
purchase to make warranty claims.
This Limited Warranty is transferable to subsequent owners but only for the unexpired portion of the Warranty
Period. Subsequent owners also require proof of purchase.
What will Xantrex do? Xantrex will, at its option, repair or replace the defective product free of charge,
provided that you notify Xantrex of the product defect within the Warranty Period, and provided that Xantrex through
inspection establishes the existence of such a defect and that it is covered by this Limited Warranty.
Xantrex will, at its option, use new and/or reconditioned parts in performing warranty repair and building
replacement products. Xantrex reserves the right to use parts or products of original or improved design in the repair
or replacement. If Xantrex repairs or replaces a product, its warranty continues for the remaining portion of the
original Warranty Period or 90 days from the date of the return shipment to the customer, whichever is greater. All
replaced products and all parts removed from repaired products become the property of Xantrex.
Xantrex covers both parts and labor necessary to repair the product, and return shipment to the customer via a
Xantrex-selected non-expedited surface freight within the contiguous United States and Canada. Alaska and Hawaii
are excluded. Contact Xantrex Customer Service for details on freight policy for return shipments outside of the
contiguous United States and Canada.
How do you get service? If your product requires troubleshooting or warranty service, contact your merchant. If
you are unable to contact your merchant, or the merchant is unable to provide service, contact Xantrex directly at:
Telephone: 1 800 670 0707 (toll free North America)
1 360 925 5097 (direct)
Fax:
1 800 994 7828 (toll free North America)
1 360 925 5143 (direct)
Email:
Direct returns may be performed according to the Xantrex Return Material Authorization Policy described in your
product manual. For some products, Xantrex maintains a network of regional Authorized Service Centers. Call
Xantrex or check our website to see if your product can be repaired at one of these facilities.
What proof of purchase is required? In any warranty claim, dated proof of purchase must accompany the
product and the product must not have been disassembled or modified without prior written authorization by Xantrex.
Proof of purchase may be in any one of the following forms:
•
•
•
The dated purchase receipt from the original purchase of the product at point of sale to the end user, or
The dated dealer invoice or purchase receipt showing original equipment manufacturer (OEM) status, or
The dated invoice or purchase receipt showing the product exchanged under warranty
975-0131-01-01
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Warranty and Return
What does this warranty not cover? This Limited Warranty does not cover normal wear and tear of the
product or costs related to the removal, installation, or troubleshooting of the customer's electrical systems. This
warranty does not apply to and Xantrex will not be responsible for any defect in or damage to:
a) the product if it has been misused, neglected, improperly installed, physically damaged or altered, either inter-
nally or externally, or damaged from improper use or use in an unsuitable environment;
b) the product if it has been subjected to fire, water, generalized corrosion, biological infestations, or input voltage
that creates operating conditions beyond the maximum or minimum limits listed in the Xantrex product specifi-
cations including high input voltage from generators and lightning strikes;
c) the product if repairs have been done to it other than by Xantrex or its authorized service centers (hereafter
"ASCs");
d) the product if it is used as a component part of a product expressly warranted by another manufacturer;
e) the product if its original identification (trade-mark, serial number) markings have been defaced, altered, or
removed.
Disclaimer
Product
THIS LIMITED WARRANTY IS THE SOLE AND EXCLUSIVE WARRANTY PROVIDED BY XANTREX IN CONNECTION WITH YOUR
XANTREX PRODUCT AND IS, WHERE PERMITTED BY LAW, IN LIEU OF ALL OTHER WARRANTIES, CONDITIONS,
GUARANTEES, REPRESENTATIONS, OBLIGATIONS AND LIABILITIES, EXPRESS OR IMPLIED, STATUTORY OR OTHERWISE IN
CONNECTION WITH THE PRODUCT, HOWEVER ARISING (WHETHER BY CONTRACT, TORT, NEGLIGENCE, PRINCIPLES OF
MANUFACTURER'S LIABILITY, OPERATION OF LAW, CONDUCT, STATEMENT OR OTHERWISE), INCLUDING WITHOUT
RESTRICTION ANY IMPLIED WARRANTY OR CONDITION OF QUALITY, MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE. ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE TO THE EXTENT
REQUIRED UNDER APPLICABLE LAW TO APPLY TO THE PRODUCT SHALL BE LIMITED IN DURATION TO THE PERIOD
STIPULATED UNDER THIS LIMITED WARRANTY.
IN NO EVENT WILL XANTREX BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, INCIDENTAL OR CONSEQUENTIAL
DAMAGES, LOSSES, COSTS OR EXPENSES HOWEVER ARISING WHETHER IN CONTRACT OR TORT INCLUDING WITHOUT
RESTRICTION ANY ECONOMIC LOSSES OF ANY KIND, ANY LOSS OR DAMAGE TO PROPERTY, ANY PERSONAL INJURY, ANY
DAMAGE OR INJURY ARISING FROM OR AS A RESULT OF MISUSE OR ABUSE, OR THE INCORRECT INSTALLATION,
INTEGRATION OR OPERATION OF THE PRODUCT.
Exclusions
If this product is a consumer product, federal law does not allow an exclusion of implied warranties. To the extent
you are entitled to implied warranties under federal law, to the extent permitted by applicable law they are limited to
the duration of this Limited Warranty. Some states and provinces do not allow limitations or exclusions on implied
warranties or on the duration of an implied warranty or on the limitation or exclusion of incidental or consequential
damages, so the above limitation(s) or exclusion(s) may not apply to you. This Limited Warranty gives you specific
legal rights. You may have other rights which may vary from state to state or province to province.
Warning: Limitations On Use
Please refer to your product manual for limitations on uses of the product.
SPECIFICALLY, PLEASE NOTE THAT THE XANTREX GRID TIE SOLAR INVERTER SHOULD NOT BE USED IN CONNECTION
WITH LIFE SUPPORT SYSTEMS OR OTHER MEDICAL EQUIPMENT OR DEVICES. WITHOUT LIMITING THE GENERALITY OF
THE FOREGOING, XANTREX MAKES NO REPRESENTATIONS OR WARRANTIES REGARDING THE USE OF THE XANTREX
XANTREX GRID TIE SOLAR INVERTER IN CONNECTION WITH LIFE SUPPORT SYSTEMS OR OTHER MEDICAL EQUIPMENT
OR DEVICES.
Please note that the Xantrex Grid Tie Solar Inverter is not intended for use as an uninterruptible power supply and
Xantrex makes no warranty or representation in connection with any use of the product for such purposes.
WA–2
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Warranty and Return
Return Material Authorization Policy
Before returning a product directly to Xantrex you must obtain a Return Material Authorization (RMA) number and
the correct factory "Ship To" address. Products must also be shipped prepaid. Product shipments will be refused and
returned at your expense if they are unauthorized, returned without an RMA number clearly marked on the outside of
the shipping box, if they are shipped collect, or if they are shipped to the wrong location.
When you contact Xantrex to obtain service, please have your instruction manual ready for reference and be prepared
to supply:
•
•
•
•
The serial number of your product
Information about the installation and use of the unit
Information about the failure and/or reason for the return
A copy of your dated proof of purchase
Record these details in on page WA–4.
Return Procedure
1. Package the unit safely, preferably using the original box and packing materials. Please ensure that your product
is shipped fully insured in the original packaging or equivalent. This warranty will not apply where the product is
damaged due to improper packaging.
2. Include the following:
•
•
•
•
The RMA number supplied by Xantrex Technology, Inc. clearly marked on the outside of the box.
A return address where the unit can be shipped. Post office boxes are not acceptable.
A contact telephone number where you can be reached during work hours.
A brief description of the problem.
3. Ship the unit prepaid to the address provided by your Xantrex customer service representative.
If you are returning a product from outside of the USA or Canada In addition to the above, you MUST
include return freight funds and are fully responsible for all documents, duties, tariffs, and deposits.
If you are returning a product to a Xantrex Authorized Service Center (ASC) A Xantrex return
material authorization (RMA) number is not required. However, you must contact the ASC prior to returning the
product or presenting the unit to verify any return procedures that may apply to that particular facility.
Out of Warranty Service
If the warranty period for your Xantrex Grid Tie Solar Inverter has expired, if the unit was damaged by misuse or
incorrect installation, if other conditions of the warranty have not been met, or if no dated proof of purchase is
available, your product may be serviced or replaced for a flat fee.
To return your Xantrex Grid Tie Solar Inverter for out of warranty service, contact Xantrex Customer Service for a
Return Material Authorization (RMA) number and follow the other steps outlined in “Return Procedure” on
page WA–3.
Payment options such as credit card or money order will be explained by the Customer Service Representative. In
cases where the minimum flat fee does not apply, as with incomplete units or units with excessive damage, an
additional fee will be charged. If applicable, you will be contacted by Customer Service once your unit has been
received.
975-0131-01-01
WA–3
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Warranty and Return
Information About Your System
As soon as you open your Xantrex Grid Tie Solar Inverter package, record the following information and be sure to
keep your proof of purchase.
Model Number
Serial Number
Purchased From
Purchase Date
_________________________________
_________________________________
_________________________________
_________________________________
If you need to contact Customer Service, please record the following details before calling. This information will help
our representatives give you better service.
Inverter Details
Type of installation (e.g. Residential/Commercial)
Length of time inverter has been installed
AC wiring size and length
__________________________________
__________________________________
__________________________________
__________________________________
__________________________________
DC wiring size and length
Description of fault messages and/or indicators on front panel
_______________________________________________________________________________________
_______________________________________________________________________________________
Description of problem
__________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
PV Details
Solar Panel Mount:
Roof
Pole
Ground
Solar Panel Brand and Model:
Nominal Voltage Range:
Peak Open Circuit Voltage:
Nominal Current Rating:
Maximum Current Rating:
Solar Tracker?
______________ Vdc
______________ Vdc
______________ Adc
______________ Adc
Yes
No
String #1:
String #2:
String #3:
String #4:
# of Panels: ______________
# of Panels: ______________
# of Panels: ______________
# of Panels: ______________
Series
Series
Series
Series
Parallel
Parallel
Parallel
Parallel
WA–4
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Index
front panel display 1–3, 5–2
fault messages 5–6
normal operation messages 5–3
offline mode messages 5–5
reading messages 5–3
special messages 5–8
startup messages 5–3
fuse, location of ground fault protection 6–5
fuses and circuit breakers 2–13
abbreviations and acronyms iv
AC circuit breaker requirements 2–13
AC grounding requirements 2–8
AC output voltage ratings A–2
AC utility voltage 4–2
AC wiring instructions 3–7
acceptable wire sizes A–5
accessing AC and DC terminals 3–2
accessories 1–7, A–6
adjustable disconnect settings A–3
general maintenance 6–3
ground clearance required for installation 2–4, 2–18
ground fault protection fuse 2–14
replacing 6–4
grounding requirements 2–8
guidelines for matching PV array size to inverter input
2–7
checking AC utility voltage 4–2
checking PV array DC voltage 4–2
circuit breakers and fuses 2–13
communication between multiple inverters 3–12
communications cabling 3–14
installing for inverters in parallel 3–16
standard CAT 5 wiring 3–14
conduit holes 2–12
heat sink cover 1–7, 2–26
humidity limits A–5
conduit nipples
installing 2–23
Customer Service
preparing to call WA–4
information about your system form WA–4
installation
fan assembly 2–23
grounding requirements 2–8
location concerns 2–4
mounting 2–19
DC wiring instructions 3–4
derating chart A–3
dimensions 2–16, A–5
display accuracy A–5
options 2–2
overview 2–15
planning issues 2–2
preparing for 2–13
PV array requirements 2–5
routing wires 2–11
inverter
features and options 1–3
installation 2–15
efficiency chart A–4
electrical specifications A–2
enclosure type A–5
error messages and solutions 6–8
model number WA–4
models 1–8
fan kit 1–7, 2–23, A–6
fault conditions and solutions 6–8
FCC information to the user viii
features and options 1–3
purchase date WA–4
purpose 1–2
removing from wiring box 6–6
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Index
serial number WA–4
parallel configuration 1–3, 3–10
AC wiring 3–10
communication between inverters 3–12
communications wiring 3–16
DC wiring 3–10
knockout locations 2–16
photovoltaic (PV) power 1–2
power derating A–5
preparing for installation 2–13
proof of purchase WA–4
purchase date WA–4
LEDs, See status LEDs
lightning protection 2–8
long-distance grounding 2–8
PV arrays
angle of the sun 6–2
maintenance, general 6–3
maximum power point tracking, See MPPT
mechanical specifications A–5
messages, See front panel display
model configurations 1–8
model number WA–4
mounting bracket
checking DC voltage 4–2
effect of shade on performance 6–2
factory ratings 6–2
grounding requirements 2–8
installation recommendations 2–5
matching size to inverter input 2–7
requirements 2–5
temperature affecting performance 6–2
types of modules 2–6
voltage requirements 2–6
installing 2–17
on backing support 2–21
on poles or rails 2–20
mounting the inverter
clearance requirements 2–18
multiple inverters 2–23
on wallboard, siding or concrete 2–21
overview 2–16
RJ45 connector requirements 3–14
RJ45 ports
preparation 2–16
single inverter 2–22
surfaces for 2–19
communication between inverters 3–13
location in wiring box 3–3
RS-232 port 3–13, 5–7, 5–9
using poles or rails 2–20
MPPT
operational window 2–6
technology 1–3
multiple inverters
AC and DC wiring 3–10
communication between 3–12
communications wiring 3–16
configuration 2–2
messages in normal operation 5–5
messages in offline mode 5–6
safety instructions vii
serial number WA–4
single inverter configuration 2–2
specifications
electrical A–2
mechanical A–5
standard features and options 1–3
standard test condition 6–2
startup procedure
check PV array DC voltage 4–2
check utility AC voltage 4–2
monitor front panel display 5–2
overview 4–2
replace wiring box cover 4–3
start the inverter 4–4
status LEDs
operation
factors affecting performance 6–2
inverter startup 4–4
messages at startup 5–3
reassembling the unit 4–3
startup procedure 4–2
description 5–9
IX–2
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Index
do not illuminate 6–8
red LED is on 6–8
temperature
affecting PV array performance 6–2
range for locating Xantrex GT Inverter 2–4
terminal blocks in wiring box 3–3
terminators, male network 3–13
thermal derating chart A–3
torque values for wires 3–5
troubleshooting the GT Inverter 6–8
voltmeter
measuring PV array DC at startup 4–2
measuring utility AC at startup 4–2
warranty
out of warranty service WA–3
terms and conditions WA–1
weight A–5
wire stripping length, recommended 2–13
wiring
AC connection planning 2–12
acceptable wire sizes A–5
conduit planning 2–12
DC connection planning 2–12
information 2–13
knockouts for 2–12
main utility service panel to Xantrex GT Inverter 3–8
preparation for 2–13
PV array to Xantrex GT Inverter 3–5
routing wires 2–11
torquing 3–5, 3–10
wire sizes 2–13
wiring box
description 1–6
removing the cover 3–2
removing the inverter from 6–6
RJ45 connectors 3–3
terminal block location 3–3
Xanbus technology 3–12
Xantrex web site v
975-0131-01-01
IX–3
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IX-4
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Xantrex Technology Inc.
1 800 670 0707 Tel toll free NA
1 360 925 5097 Tel direct
1 800 994 7828 Fax toll free NA
1 360 925 5143 Fax direct
customerservice@xantrex.com
www.xantrex.com
975-0131-01-01
Printed in China
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