How does an RV’s electrical system work?

RVs have two different electrical outlets: a 12-volt automotive-type DC system and a 120-volt AC household-type system. The 120-volt device is operated by an RV electrical hookup plug or a generator, and it runs the kitchen and large electrical appliances. Most lights, other appliances, and electrical motors operate on 12-volt, which allow for dry camping without plugging into an external power supply. When plugged in or running off a generator, the power is used to charge the 12-volt batteries and high-demand systems/appliances such as the air-conditioner or microwave.