Following several long (7 hour+) duration power cuts where the PV and battery were fortunately sufficient I wondered if I could connect a small (3kW) 230V ac generator to this input
Obviously I would need to manually start it which wouldnt be a problem and from the diagram it appears it would supply the WHOLE house load plus battery charge if, say there was no PV input so it would need limiting to 3kW...
I am forward thinking in case of more long duration power cuts where there could be no PV so the generator would effectively be "the grid" and the house would run from the battery or PV if possible with any excess loads provided by the battery and inverter as per normal, under low house load the generator would mainly be charging the battery ready for later demand
I did also consider rectifying the ac from the genny into DC (yes, I am aware of the dangers of high voltage DC and would take relevant precautions) and connecting that to one of the spare "PV" inputs, the spec says this can be 80 to 500V but internet searching discourages this idea as the DC supply would be dirty unlike the pure DC from PV or battery and the MPPT in the inverter would probably play havoc with the genny output
