Product Manual

Operation
20 900-0145-01-01 Rev B
NOTES
:
IMPORTANT:
Setting
DoD Volts
too low will severely discharge the batteries. The battery bank may
not have sufficient reserve to provide backup in the event of a grid failure. To prevent
the loss of power, load use and the
DoD Volts
setting should be planned accordingly.

If the renewable energy source is not greater than the size of the inverter loads, this mode will not work well
over time. The renewable source must be capable of charging the batteries as well as running the loads.
This occurs when renewable energy production exceeds the
DoD Amps
setting.

The inverter will offset the loads with excess renewable energy if it is available from the batteries. See
page 35 for more information on Offset operation. However, the behavior of Offset in Grid Zero mode is
different because it uses the
DoD Volts
exclusively.

The inverter’s battery charger cannot be used in this mode. However, the menu settings and timer
operations are not changed when this mode is selected.

The battery should be discharged whenever possible in the attempt to “zero” the grid usage. If the
DoD
Amps
setting is limited or loads are not present, the batteries will be unable to accept much renewable
recharging the next time it is available. The renewable energy will be wasted, leaving the system
dependent on the utility grid more than necessary.