Owner’s Manual for Generac PWRcell Inverter 9
General Information
Clean Backup
NOTE: Grid power is not used to charge batteries in this
mode.
See Figure 2-5. In Clean Backup mode, the inverter
prioritizes keeping the battery charged and ready for a
grid interruption using solar power only. If the battery is
not fully charged, the inverter uses all available solar
power to charge the battery.
See Figure 2-6. When the battery is fully charged, solar
power will flow to local loads and the grid.
Figure 2-5. Clean Backup (1 of 3)
Figure 2-6. Clean Backup (2 of 3)
See Figure 2-7. When grid service is interrupted, the
system enters Islanding mode. In Islanding mode,
protected loads are supported by solar and battery
power. If enough solar power is available, the solar will
simultaneously charge the battery and support the loads.
Figure 2-7. Clean Backup (3 of 3)
Priority Backup
In Priority Backup mode, the inverter prioritizes keeping
batteries charged and ready for grid interruption using
solar or grid power. If the battery is not fully charged, all
available solar power is used to charge the battery. When
the available solar power is lower than the battery input
power rating, the inverter uses grid power to expedite
battery charging.
See Figure 2-8. If solar and grid power are available,
both can charge the battery. The system displays the
amount of power being drawn from the grid and the
amount of power being consumed by local loads before
reaching the battery.
Figure 2-8. Priority Backup (1 of 2)
See Figure 2-9. In the event of grid failure, the inverter
enters Islanding mode. Protected loads are supported by
solar and battery power. If enough solar power is
available, the solar simultaneously charges the battery
and supports the loads.
Figure 2-9. Priority Backup (2 of 2)
Self Supply
NOTE: This feature requires CTs to be properly installed
and calibrated prior to use. For more information on CT
calibration, see the PWRcell Inverter Installation Manual.
In Self Supply mode, the inverter prioritizes powering
local loads using solar and/or stored power first. This
mode is optimal in markets where net metering is
unavailable or unfavorable, making battery-stored power
more economically attractive than grid-provided power.
See Figure 2-10. If more power is being produced by the
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