nadsab wrote:
You mean it connects to the chassis (engine) battery as well?
Not usually on a C, original equipment. There are add-on devices to charge the chassis battery from the converter, when there is a current from the convertor, but more often on a C you will have only a boost switch, a momentary contact device to connect house and chassis batteries for an engine starting emergency.
More common on a C will be an isolator (switch or solid state device) that connects the house battery and 12V circuits to the chassis 12V when the alternator has sufficient output.
Otherwise, engine battery and house battery and circuits are not connected, so that the battery on one side does not drain the battery on the other.
The inverter, if you have one, converts 12V DC to 120V AC. It will drain the battery if left on, because it draws some power at no load. Some types draw significant power at no load.
A C most often has a small inverter to power some entertainment systems while driving or when stopped without a power hookup.
Some larger RVs have a whole-house inverter (and huge battery banks, more powerful alternators) to power most of the 120V systems from storage battery or alternator. These units are typically combined with the battery charger. These would also be switched off for storage.
