Artemus,
When it comes to house battery bank, I have the same challenge on my 322 – three starting batteries with house loads connected to one of them. Fridge by itself kills that battery pretty quickly.
I’m in the process of adding 4 golf cart batteries totaling 450 Ah. With no shore power in my marina I have to rely on generator and alternators. Thus I’m adding dedicated 80Amp charger and couple voltage sensitive relays. Next question of course is where to fit all that. I decided to rearrange all engine wiring, trim pump and macerator pump on starboard site. To move the wires I had to remove holding tank so while I am at it, I am also changing all sanitary hoses.
The plan is to put 2 starting batteries in the aft stb corner and 2 golf cart batteries on each site of generator, but the plan might change. The picture attached shows the milestone I reached on the weekend: “disassembly”
