The way it is set up now. There are 3 agm's in one house bank, a single
flooded grp 24 in a second bank on a 0,1,2,both switch. These run both house loads and starting. Then there is an isolated batt grp 24 to start the genset.
What I really want is to increase the agm count to 4 and have a small battery of some sort like an agm grp 34 that can start either the main engine or genset. Unfortunately there isn't room for the 4 th house batt in the location where the house bank is located. I figure I can hook the fourth batt to the existing switch or I can run wires from the fourth battery back to the existing 3. But I really want the house and start batteries to be able to start and be charged from either the main engine or genset.
I hope that made sense.