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Mounting the Inverter
975-0253-01-01
2–9
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, in accordance with wire size tables in applicable codes.
AC Circuit Breaker Requirements
For GT-DE models, the main utility service panel must dedicate a single-pole (in
the Active line) or double-pole breaker for each inverter installed. For GT-SP
models, the main utility service panel must dedicate double-pole breakers only for
each inverter installed. This breaker must be branch-circuit rated and capable of
handling the rated maximum output voltage and current of the inverter (see
“Electrical Specifications” on page A–2).
AC and DC Disconnects
Depending on the installation, external AC and/or DC disconnects may be
required, and they may need to be in a location easily accessible to utility or fire
personnel. Consult local codes and authorities for additional information.
Mounting the Inverter
Overview
General installation
steps
Installing of the GT Inverter includes these main steps:
1. Mounting the GT Inverter (this chapter)
2. Making the DC connections from the PV array to the GT Inverter
(“Connecting the DC Wiring” on page 3–2)
3. Making the AC connections from the GT Inverter to the main utility service
panel (“Connecting the AC Wiring” on page 3–7)
Figure 2-3 summarizes these steps.
Important:
Wire size should be based on the maximum power rating of the inverter.
Ensure that wiring is not undersized. Undersized wiring can result in significant power
losses and reduction in system efficiency.
WARNING: Fire, shock and energy hazards
Before installing the GT Inverter, read all instructions and cautionary markings located in
this manual, on the inverter, on the PV array, and on the main service panel.
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Summary of Contents for GT 2.5-DE, GT 3.8-DE, GT 2.8-S
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