Generac Power Systems PWRcell M3 Owner's Manual page 14

General Information
Setpoint
Shut off point where the battery stops discharging during a utility service interruption. When battery SoC
reaches this value, the battery will go to sleep. The battery will charge again as soon as power is available on
REbus. If the grid is not present and the system was islanding, the system will perform a Power Search every
hour for four minutes. See
Min Absolute
•
SoC
•
If this setpoint is raised, the system will go to sleep sooner during an outage, but the Power Search reserve
will be larger.
Maximum percent the battery can charge to. When battery SoC reaches this value, the battery will not charge
Max Absolute
from any source.
•
SoC
Lowering this setpoint reduces usable capacity and is not recommended.
Manages the reserve of power guaranteed to be available for local loads in the event of a grid outage while
operating in Self Supply system mode. When battery SoC drops to this setpoint, the battery will stop
discharging to power local loads, retaining the minimum reserve for backup power in the event of a utility
service interruption.
Minimum Reserve
•
SoC
•
•
Manages battery capacity by prioritizing where PV power goes. When battery SoC reaches this value, PV
power is diverted from charging the battery to powering local loads and export to the grid, saving battery
Maximum
capacity available for charging for a later time. When excess power is not needed by local loads and can not
be exported to the grid, this extra capacity can be used to absorb peak PV to mitigate potential clipping.
Reserve SoC
•
Changing this value is only recommended for appropriately sized systems.
Adjusting SoC Setpoints
SoC setpoints are adjusted using the inverter control
panel. See the Generac PWRcell Inverter Manuals for
additional information regarding inverter control panel
operation.
To adjust SoC setpoints:
1. Use the left and right arrows to access the battery
device page, and press center button to enter the
battery menu.
2. Use the up and down arrows to highlight Mod.
Settings, and press center button to enter the Mod.
Settings menu.
3. Use up and down arrows to highlight the desired
setpoint, and press center button to select.
4. Use up and down arrows to adjust setpoint value.
5. Press center button to deselect the setpoint.
10
Table 2-2. Battery State of Charge Setpoints
Power Search
Default value is 2%.
If this setpoint is lowered, the system can provide more energy before it goes to sleep, but the Power
Search reserve will be smaller.
Default value is 100%.
Default value is 30%.
Lowering this setpoint increases battery capacity available for Self Supply, but lowers the islanding
reserve in the event of an outage.
Raising this setpoint lowers capacity available for Self Supply, but increases islanding reserve in case of a
grid outage.
Default value is 100%.
Behavior
.
6. Use down arrow to scroll to the bottom of the list
and select Save.
PLM_Channel:
MinSoCAbs:
MaxSoCAbs:
MinSoCRsrv:
Cancel
Figure 2-7. SoC Setpoint Screen Example
Owner's Manual for Generac PWRcell Battery
1
2.0%
100.0%
30.0%
Save
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