question

@guydusautoy

https://www.victronenergy.com/media/pg/Energy_Storage_System/en/ess-introduction---features.html

You should probably remove the ess assistant then if you are wanting inverter priority.

The ac ingore overides all the useful features of the ess assistant and the system will ingore all the settings in that assistant. If you have a pv inverter use the pv assistant instead.

If you followed the instruction article and tweaked it for your system it should be good otherwise.

https://www.victronenergy.com/live/assistants:ignore_ac_input_using_the_generator_assistant

What are you using for soc? Need to make sure it is always accurate.

Hello guydusautoy,

unfortunately you totally misconfigured your unit. With an ESS installed (not designed for offgrid) a grid code must be set. I don't know which one you used, but it would have been much better not to use ESS. If you have the password remove the gride code and also the ESS.

Wide voltage and frequency range should be accepted, UPS function should be disabled. If you need the charger enable weak ac input. After that set an input current limit, enable power assist and dynamic current limiter.

To get the assistant working you have to OPEN the relay instead of closing it.

regards,

porcini

Thank you for the inputs. It is noted that ESS is not recommended for off grid or intentional islanding setups.

I would like to know what charging profile ESS uses during extended grid loss and how the solar and battery outputs are managed to meet the load.