Seasonal Adjustment of the Battery Usage

The options for increased self-consumption depend to a large extent on the battery and on the availability of PV energy. In order to use the battery optimally, you can adjust the depth of discharge of the battery to the application.

In many regions, the PV energy available largely depends on the season and the hours of sunshine. On short days with few hours of sunlight, the Sunny Island cannot charge the battery fully. Lead-acid batteries in particular age faster due to low charging over a long period. Therefore, it is better if the battery is not discharged too much by the Sunny Island on short days. On short days, there is insufficient PV energy to charge the battery. On long days with many hours of sunlight, the Sunny Island can usually charge the battery fully. On such days, it is better to use as much of the battery capacity as possible for increasing self-consumption.

The discharge behavior can be adjusted to the location and time by the Sunny Island. Furthermore, you can set a seasonal adjustment (Battery > Areas of application > Season operation active). The Sunny Island only uses a small portion of battery capacity for increased self-consumption on short days when adjustment is activated. The Sunny Island uses a large portion of the battery capacity for the increased self-consumption on long days. The seasonal adjustment prolongs the electrical endurance of the battery in regions where the available PV energy is largely dependent on the season.