Wiring the Inverter
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Connecting Multiple Inverters
For installations with multiple inverters, a separate PV array is required for each
GT Inverter unit. The output of each GT Inverter feeds a separate single-pole (in
the Active line) or double-pole circuit breaker in the main utility service panel.
When connecting multiple inverters, complete the wiring and perform the
commissioning procedure for each inverter one at a time. For wiring instructions,
see “Connecting the DC Wiring” on page 3–2 and “Connecting the AC Wiring”
on page 3–7. For the commissioning procedure, see page 4–2.
WARNING: Shock hazard and equipment failure
In multiple inverter installations, it is very important to ensure each inverter is correctly
connected to its own PV array(s) and that no wires are crossed. For example, connect PV1
positive (+) and PV1 negative (–) to inverter 1 and PV2 positive (+) and PV2 negative (–)
to inverter 2.
Do not connect PV1 positive (+) and PV2 negative (–) to inverter 1 and PV2 positive (+)
and PV1 negative (–) to inverter 2. As shown in Figure 3-4, this configuration can cause
short circuit failures in the inverters and may also generate hazardous voltages within the
system.
Figure 3-4
Improper Multiple Inverter Connections
–
–
+
+
PV Array #1
PV Array #2
GT Inverter #1
GT Inverter #2
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