This operating mode of the battery means that the battery is charged with any excess energy from the solar panels. The energy from the solar panels primarily goes to consumption in the house, but as soon as an excess of solar arises, this is charged into the battery. Conversely, the battery is discharged as soon as the PV is not enough to cover the consumption in the house. This means that as many kWh as possible is used in the house and you avoid buying electricity for the longest time. In this operating mode, the system will strive to drain the battery so it is always ready to store excess PV power. If solar production during one day does not cover the daily need for electricity, the battery will therefore be discharged to the lower SOC threshold in the evening.


To control how this operating mode works, the following parameters are used:


Parameter

Function

Default setting

Upper grid threshold [kW]

The battery is discharged so that imports from the electricity grid do not exceed this level

0 kW

Lower grid threshold [kW]

If the export to the electricity grid exceeds this level, the battery is charged

0 kW

Maximum charge threshold

[kW]

Limits the maximum power at which the battery can be charged. If solar production exceeds the sum of the maximum charging power and the load, solar will still be exported to the electricity grid.

System dependent

Maximum discharge threshold

[kW]

Limits the maximum power at which the battery is discharged.

System dependent

Upper SOC threshold [%]

Limits the maximum State of Charge (SOC) allowed in the battery

Battery dependent

Lower SOC threshold [%]

Limits the minimum State of Charge (SOC) allowed in the battery

Battery dependent