Hi All,
My system is an ESS setup: Quattro, Cerbo GX, Batteries, 3kW SMA inverter. The problem I have is that frequency shifting will not work for my setup since the SMA is configured for Grid attached (and needs to stay like that for the DNO) since I have a bypass switch that allows the Victron system to be bypassed and the SMA PV inverter to be physically grid attached. So, in the event of a Grid failure, with batteries full there is no control over the PV output. Thinking of upgrading to a Fronius inverter but it too would need to configured as 'grid attached' and so frequency shifting again wouldn't be an option. The question is whether connecting the cerbo GX and the Fronius via ethernet would allow the system to 'safely' control the Fronius PV output in the situation when there is a Grid failure, the batteries are full and excess PV is being generated? Note: When grid attached I'm not concerned about zero feed-in (DNO authorised for 3kW).
Colin