Battery Use by Battery-Backup Systems with Increased Self-Consumption

A

Self-consumption range (SlfCsmp)

The battery inverter uses the batteries within this range for increased self-consumption and for the "Time-of-Use" and "Peak Load Shaving" functions that can be configured in the power profile.

C

Minimum width of backup power range (BURes)

Range for battery-backup operation during grid failure This range is set to 0% by default. If an automatic transfer switching device is connected, the range must be set depending on your needs. The setting value refers to the user SOC.

Utility grid available:

When the upper limit of C is reached, the battery inverter goes into standby mode. The batteries remain switched on. Excess PV energy is used for conserving the battery charge.

When the SOC in range C has decreased by the set value of range B, the battery inverter recharges the batteries with 3 A from the utility grid.

If the set value of the parameter for range B is higher than the set value of the parameter for range C, the batteries are recharged in range D first.

B

Range for maintaining battery state of charge (PVRes)

Utility grid available:

The battery inverter checks the current SOC every 24 hours. If the SOC is in range D, the batteries are recharged with 3 A from the utility grid until the upper limit of range C is reached.

During battery-backup operation:

The battery inverter starts up every 2 hours for approx. 6 minutes and attempts to charge the batteries with PV energy. If no excess PV energy is available, the battery inverter switches to standby mode.

D

Minimum width of deep-discharge protection range (BatRes)

Once the limit from B to D is reached, the battery and battery inverter switch off. The battery-backup operation can be enabled by switching on the black-start switch of the battery inverter. If the battery is not recharged after 6 minutes, the battery-backup operation will be stopped. No automatic start-up process will be initiated after 2 hours

When range D is reached and the utility grid is available, the battery inverter charges the batteries with 3 A from the utility grid.

E

Lower limit of the deep-discharge protection range for disconnection (ProtRes)

If range E is reached during battery-backup operation, the batteries are switched off. The battery inverter is also switched off due to a lack of DC voltage.

When range E is reached and the utility grid is available, the battery inverter charges the batteries with 3 A from the utility grid until range A is reached.