Schneider XW E-Panel Manual

XW E-Panel installation manual
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Wiring: Start with the grounds. Wiring the system will be easier if grounds are done first.
The E-Panel comes with a 6AWG green ground wire shown above. The ground chassis lug on the
bottom of the inverter is the same electrical connection as the three inside the wiring compartment
of the inverter. You may use this large terminal as the one single ground connection to the inverter
and then connect all other grounds to the E-Panel ground bus. Since the E-Panel ground, inverter
chassis ground and wiring compartment grounds are all at the same potential, you may use any and
all as required although electrical inspectors are used to finding all grounds on just one busbar. The
E-Panel ground bus is the proper place for this single point ground on an off-grid system. Your
main distribution panel ground is the proper AC ground for utility connected systems. Use the E-
Panel ground bus for the DC grounds in a utility connected system. Inspectors will want to see a
separate ground wire from AC and DC on a utility connected system. You can use a single ground
wire from the E-Panel for AC and DC for an off-grid installation.
Neutral to ground bond: All AC electrical systems in North America must have an AC Neutral to
Earth Ground bonding connection. A typical distribution panel such as Square D makes this bond
by use of a bonding screw. That green screw grounds the neutral busbar when installed. Electrical
inspectors are used to looking in the main distribution panel for this electrical bond. In a battery
backed up grid tie or power back up installation, this bond has already been made in the main
distribution / service entrance panel. Do not add it inside the E-Panel when the utility is connected.
In an off-grid installation where there is no utility connection, the bond should be done inside the E-
Panel as shown here.
6AWG Neutral to Ground bonding wire. The bond should be done
at the power source and since the E-Panel is central to the power
generation, it is considered the source. Some electrical inspectors
are used to looking for this bond to be accomplished in the
distribution panel. They may ask you to move it to where they feel
comfortable finding it. Don’t fight it. The bond will work just fine
in a Square D box too.
DC-GFP installation: The NEC 2008 requires a DC-GFP in all US systems!
When installing a DC-GFP in the PV circuit, make sure there is no battery minus to ground
connection. That would effectively short out the sense circuit on the DC-GFP. MidNite solar has
Chassis ground connection to inverter
E-Panel earth ground bus (AC & DC)