AC500: SOC settings overrides all? Even when "NO" for "Charge from Grid"?

Hi,

this night I saw when SOC arrived at 15% (the lower value I’ve chosen for SOC settings) that the inverter started charging from grid.

Why?

I disabled the funktion “charge from grid”.
Is SOC settings always of first order?
If yes, in my opinion it shouldn’t be.

Plugging off the AC cable is my solution …