I am using a Multiplus IIGX 3000/48 as a UPS (Australia). I also have house grid connected SunnyBoy PV 1.5kw. If I use the PV Inverter Support Assistant will a) the PV inverter feed to the grid through the MPII when connected to AC out1 and b) provide PV AC to critical loads when the grid is down and c) when the grid is down, protect the battery from overcharging. I'm not sure if I should use this assistant or ESS. I am not trying to timeshift energy usage, just provide a reliable UPS. David