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900-00277-01-001 Rev A ©2021 OutBack Power. All Rights Reserved.
Operation
Generator Usage
The Mojave inverter can connect to a generator to charge batteries and run loads when the utility
grid is not available. The generator must be 120/240 Vac (three-wire or “split-phase”) and 60 Hz.
It cannot accept single-phase (two wire 120 Vac, 230 Vac, or 240 Vac) or three-phase input.
The generator can be started with a manual command or programmed to run automatically with the
automatic generator start (AGS) function. The generator can start or stop according to battery
state, load size, or several other external conditions.
Generator Limits
The generator’s size should be specified with the setting
Generator output rating
. This will help
prevent the inverter from overloading the generator.
The generator must be stable within certain voltage and frequency limits. These limits are
adjustable with the following settings:
High voltage limit
Low voltage limit
CAUTION: Equipment Damage
Use of a three-phase generator with this equipment may damage either the inverter or the
generator. This damage to the inverter is not covered by the product warranty.
NOTES:
The Mojave inverter will not work with a DC generator. The input from an AC generator
must be connected to the
G
EN
terminals and must not be connected to other locations.
The inverter has a separate
G
RID
connection (see page 42). These independent
connections are used for wiring to multiple AC sources. However, the inverter can only
use one AC source at a time. If both connections are powered, the inverter
automatically accepts
G
RID
. It cannot accept
G
EN
as long as
G
RID
is active.
If inverter programming has forced a disconnection from the grid (even if grid power is
still present), the inverter can accept generator power instead.
Generator Input
When the inverter
G
EN
terminals are connected to a stable AC generator, the
G
RID
terminals are
not in use, and
Generator
in the
ACTIONS
view is set to
Use
, the inverter will synchronize itself
with the generator and connect to it. When automatically started, the
Warmup time (s)
setting
allows the generator to temporarily run unloaded while its output stabilizes. Once this time expires,
the inverter’s transfer relay will engage, linking the
G
EN
terminals directly with the
L
OAD
.
See page 49 for more information on the function of the transfer relay.
When these conditions are met, the inverter will close its transfer relay and accept the generator. If the
conditions are not met, the inverter will not close the relay or accept the generator.
If the generator is shut down (or if the parameters are no longer met), the inverter will open the relay.
This isolates the protected loads from the generator and allows the inverter to serve the loads instead.
High frequency limit
Low frequency limit
