The battery switch system is very simple but effective, i have used a Blue Sea systems 500 amp remote battery switch, this enables the truck battery's to be isolated by the flick of a switch.
In addition i have fitted a split charge system that enables the house battery's to be charged by the trucks 120 amp alternator, it also allows the house battery's to be switched into the truck to assist in starting should the truck battery's be flat for any reason.
the connectors marked 12v and 24v are jump cable attachment points.
Everything you see here will be behind the bumper when it is refitted.