Conext XW Pro Installation Guide

AC System Bonding
WARNING
MULTIPLE AC NEUTRAL-TO-GROUND BONDS
Verify that only one neutral-to-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.
Failure to follow these instructions can result in death, serious injury, or equipment
damage.
System bonding refers to connection (bonding) of one of the current-carrying conductors
of an electrical system to ground. This creates a "grounded conductor" or "neutral" that is
at ground potential, but is separate from the equipment ground conductor. System
bonding must be done at only one location.Procedures for system bonding vary between
on-grid and off-grid systems.
System bonding for on-grid systems
The Conext XW Pro does not connect the neutral to ground. The AC input neutral is
already bonded to ground by the incoming utility grid system. Do not connect the neutral
to ground in any additional location.
The Conext XW Pro does not switch or disconnect the AC neutral in any mode of
operation, so even in invert (back-up) mode, the inverter load sub-panel neutral is bonded
to ground by the utility grid system. It must not be grounded again in the inverter load sub-
panel.
System bonding for off-grid systems
In a system without a generator, or with a generator that does not provide a grounded
neutral, you must make the connection from neutral to ground in the inverter load sub-
panel or main distribution panel, as applicable.
In a system with a generator that provides a grounded neutral, no additional connection
from neutral to ground is needed. Do not connect neutral to ground in the inverter load
sub-panel or main distribution panel, as applicable.
Wiring Conext XW Pro Installation Guide
990-91228A-01 This manual is intended for use by qualified personnel 60