DESS does not charge the batteries to 100% if there is no sun

Past month I have noticed that DESS does not even try to charge the batteries to 100%. It hapens in case there is not enough sun available. It just keeps the battery level at minimal SOC +5%. Simultaneously DESS ignores the electricity costs and use grid directly to consumtion.


Although it plans properly for the next day, DESS always changes its plan for today ignoring the electricity costs:

Do you have an idea how to correct this behaviour?