Sorry for the multitude of topics.
For our Alfen chargers, we have implemented some logic externally (which I will move to OpenEMS if my tests are successful) to start charging when the dynamic price is low. When starting charging, we chose not to discharge the battery system because we probably need that power at a different moment.
Inverter is a GoodWe ET, which is was previously controlling with Loxone
I was normally changing EmsPowerMode to 11 or 12, with a EmsPowerSet to 0 value, to basically turn the battery off.
However, when trying to change the channels EmsPowerMode and EmsPowerSet, no changes happen (nor via the API, nor via the UI set channels)
I do see in the log
Nov 15 09:10:33 ubuntu java: 2023-11-15T09:10:33,209 [_cycle ] INFO [ontroller.api.common.ApiWorker] [ctrlApiRest0] Set Channel [ess0/EmsPowerMode] to Value 
so the system actually receives the commands.
Any idea what the conflict could be here?