AccESS Installation Manual

REV020620
SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | [phone] | [e-mail]| SimpliPhiPower.com
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Inverter Charger Grounding
The Conext XW Pro or XW+ is provided with ground terminals that must be reliably connected to
ground (protective earth) by appropriately sized equipment grounding conductors. System
grounding for the AC and DC systems must be done according to all applicable NEC and local
installation codes.
Feed-in Protection Requirements
The amount of power that can be fed into a distribution panel and the means and location for
feed-in, must be in accordance with NEC 2017 article 690.64 or the current requirements of the
local electrical code.
Failure to follow these instructions can result in damage to equipment and Void the Warranty.
4.5.3 – AC System Bonding
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 or serious injury and will Void the Warranty.
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 or XW+ 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 or XW+ 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.
For more information regarding installations with a generator, please refer to Schneider Electric’s
manual for the AGS.