State of charge

In periods when yields are low, the set min. SoC is increased dynamically to avoid a deep discharge. As soon as sufficient charge energy is available again, the min. SoC is reduced again to the value set.

A second time period with a second min. SoC can be assigned and this is then used for the set time period.

Especially in the second half of the year, when the PV yield is lower, the battery is no longer sufficiently charged more often and the min. SoC is reached very early on. However, energy is still needed for internal battery control and the battery is therefore discharged further. If this state is maintained for long periods, the SoC may fall below the battery’s min. SoC. If this min. SoC is reached, the battery is charged from the grid by means of a trickle charge. This protects the battery from deep discharge.

To prevent a trickle charge from the grid or for other reasons, another min SoC can be assigned using the alternative time period.