Quattro with ESS won't start inverting with low loads

Hi all,

I have a Quattro 15kVA running with ESS assistant. AC-Coupling with two 6kW Huawei inverters and a 12kWh battery bank (will increase to 55kWh shortly).

I have found that when PV inverters do not supply as much energy as demanded at home, it starts getting it from the grid instead of the battery bank. This seems to happen when loads are under 500W aprox. If I increase loads, it would start inverting from the batteries which is what it is expected to do.

I have tried different Grid Setpoints from 100W to 10W and Grid Feed-in is activated for AC-Coupled PV but nothing changes. It happens both with BatteryLife on and off.

Another weird thing is that once it reaches the float state it would switch to "discharging / absortion" very frequently with small currents normally under 2A. Is this normal or should I change any parameter?

Thanks in advance