Schematic of coach showing traditional combiner installation

Basic wiring diagram for 12VDC circuits using combiners. I've hidden all the complexity of automotive and house 12V circuits to just show how the batteries, converter, and alternator are connected. This method keeps all batteries charged when any charger is alive, but only discharges the house battery during dry camping or the engine battery during starting. Later in the album, there is a newer version of this schematic, along with a different (and for most folks, better) approach that leaves the isolator in place.