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Step 4: Wiring the Inverter
975-0239-01-01 2–19
AC Wiring to the Inverter AC Distribution Panel
An inverter AC distribution panel (also known as a sub-panel or inverter load panel) and
AC conduit must be installed before AC wiring is connected to the inverter.
Install the inverter AC distribution panel and conduit as follows:
1. Determine the location for the inverter AC distribution panel and install it according to
the manufacturer’s directions.
2. Install an AC conduit between the XW Power Distribution Panel and the inverter AC
distribution panel.
3. Determine which circuits the inverter will power and install the appropriate circuit
breakers into the inverter panel.
4. For On-Grid systems:
a) Disconnect all power to the main utility panel.
b) Determine which circuits will be backed by the inverter(s) and remove their wires
from the main panel.
c) Reroute these wires to the new inverter subpanel.
5. Remove unused breakers from utility panel. It is now safe to re-energize the main
utility panel.
6. Install a 60-amp maximum (disconnect) main circuit breaker in the inverter panel.
This will later be wired to the inverter’s output.
AC Wiring to the XW Power Distribution Panel
To connect the XW Power Distribution Panel to the inverter:
1. Connect the wires labelled “INV1 N-LOAD (SPLIT PHASE)”, “INV1 L1-LOAD,
and “INV1 L2-LOAD” (from the L1 and L2 terminals on the input (top) side of the
output breaker and the neutral bus) to the AC Load (L1-LOAD, N-LOAD, L2-LOAD)
terminals on the inverter. Connect the neutral wire first to the N-LOAD terminal.
WARNING: Shock Hazard
Before making any electrical connections, ensure both the AC and DC disconnect devices are in the
OPEN (disconnect) position.
CAUTION: Equipment Damage
Verify that only one neutral/ground bond exists in the system. Having more than one neutral to
ground bond in a system violates local electrical codes, may create a shock or fire hazard, and may
cause some sensitive equipment to malfunction.
CAUTION: Damage to the Inverter
The inverter’s AC output must never be wired to the utility or generator output. This will cause
severe damage to the inverter which is not covered under warranty.
Important:
The XW Inverter/Charger is provided with fixed disconnect limits for voltage and
frequency. These limits are fixed when the unit is exporting power to the grid. The unit shall not be
aggregated such that it can export more than 30 kW on a single point of common connection.
Important:
Both lines of input power must be connected in order for the XW Inverter/Charger to
operate. For example, L1 and L2 of Grid Input and/or L1 and L2 of Gen Input need to be connected.