I’m not sure about what to describe and where the problem is. But I have found several situations with usage from power by grid while PV production would be able to provide 100% consumption but battery is charged from grid?
The price for next hours is not explaining the need for additional charging from grid:
I just found your (more detailed) post here, after I had already replied in photovoltaikforum. For reference:
We are currently working on improving the behaviour with Time-of-Use-Controller in combination with (sufficient) PV production. We have a FEMS release schedule for 20th February which should improve the behaviour of the BETA test. Code will be released in OpenEMS then as well.
Thank you. I’m looking hopefully forward to Feb. 20th.
Due to external management of the EV chagers (with evcc) it is difficult to manage charging with PV surplus while FEMS makes a decision to charge battery from grid while the EV chargers could have a lower current to charge both: the EVs and the home battery