Seperate the two banks, that way the starting batteries are always fully charged. Keep the gen set battery seperate too. Just to let you know I have owned a Skid loader for16 years, use it durning every winter and parts of the summer, never had a trickle charger on the battery for all those years. (same battery as when I purchased the unit). Everstart batteries are pretty good they are the most popular brand of car battery that you can get. They also make them for things like lawn mowers, and 4 wheelers. The EverStart battery line includes a battery for nearly every make and model vehicle.For 50 years, we have kept North American trucks and buses moving with out trusted aftermarket parts. To the drivers on their way from Point A to B, to the fleet managers whose success depends on optimal uptime, and the dealers who connect all the parts and pieces: you are our first priority.