Switching from Inverter to Mains:Thanks.
The thing i need to get my head round is how to switch over and divert between inverter and hookup, and how to feed power back from hookup to trickle charge both SB and LB if required, although solar may provide enough.
I put magic there, as that is the brains of the system. Either a magic black box, or my own set of separate incantations.
There will be many incarnations of this, hence doing it in draw.io