I would like to use ESS mode 2 to control the power output of my Multiplus 2 without having the need to implement my own control loop.
For ESS mode 3 it is stated in documentation, that the value written as Grid power setpoint is measured at the AC input of the device. Meaning that setting a -100 will feed 100W back from AC input.
For ESS mode 2 this is not as clear for me. From the documentation I read that the Grid power setpoint is the value the Multi will try to match at the grid meter with it's own control loop.
Setting the grid power setpoint to -100 would then have no meaning for the AC input as it would depend on loads connected on AC input. If e.g. a 500W load is active on AC input, the multi would output 600W then to match the grid power setpoint of -100.
Is that understanding correct?