Battery Use by the Sunny Tripower Smart Energy

The Sunny Tripower Smart Energy enables configuration of a self-consumption range (SlfCsmp) and a backup power range (BURes) for using the battery. Additionally, a deep discharge protection range (BatRes) is defined, which usually can be configured in the range from 1% to 50%, but is not displayed as available energy.

If the inverter is used in battery-backup mode, the battery state of charge is lower than the safety limit for the deep discharge protection range, and no PV power is available, the inverter switches off. As soon as PV power is available, the PV inverter starts operating again. The PV inverter does not provide any AC voltage until 1/6 of the reserved backup power range has been recharged. Once 1/6 of the backup power range has been charged, the Sunny Tripower Smart Energy provides AC voltage and the loads connected to the backup power are supplied again.

Example

The user reserves 30% user SOC of the battery capacity for backup power. In the case of a battery capacity of 10 kWh, 3 kWh is always reserved for the backup power. If the inverter is used in battery-backup mode, the battery capacity is lower than the safety limit for the deep discharge protection range, and the night begins, the inverter switches off. If the sun shines the next day, the inverter starts to operate. However, no loads are supplied until the battery has been charged to 1/6*30 % = 5 % = 0.5 kWh user SOC.