REV110619
SimpliPhi Power, Inc. | 3100 Camino Del Sol | Oxnard, CA 93030, USA | (805) 640-6700 | info@simpliphipower.com |
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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. The Sol-
Ark’s neutral busbar accepts wire sizes up to
4 AWG
.
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 Sol-Ark does not include a connection between neutral and 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 Sol-Ark 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
’s 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 Essential Loads panel (the inverter
’s load sub-panel),
which is actually
the home’s main house breaker panel in an off-grid system.
In a system with a generator that provides a grounded neutral, no additional connection from neutral to
ground is needed. In ths case, do not connect neutral to ground in the Essential Loads panel (the
inverter
’s load sub-panel).
4.5.4
– Making DC Connections
The Sol-Ark contains two built-in MPPT charge controllers, each containing two solar PV input ports (for a
total of four PV string input ports per Sol-Ark). Adhere to the relevant Sol-
Ark model’s charge controller
specifications when sizing the paired solar PV array (explained further in this section of the Manual).
CAUTION:
All solar PV strings wired to the same charge controller must be rated at the same
voltage.
1. Before connecting the solar PV, verify the cable polarity and mark the cable accordingly as Positive or
Negative.
2. The AccESS Sol-Ark is equipped with multiple knockouts (see Figure 16.0 on the following page).
Utilize any one of these to feed the PV wiring from the PV disconnect into the AccESS enclosure.
