Class A
Built on a bus-style chassis, gas or diesel. House banks are often in a basement compartment, sometimes on a slide-out tray, and can be large. Chassis batteries are in a separate compartment. Diesel pushers usually have two or more large starting batteries near the rear engine. Many Class A coaches have inverters and generators.
Class C
Built on a truck or van cab chassis, like Ford E-Series, Ford Transit, Chevrolet Express or Mercedes-Benz Sprinter. The chassis battery sits where the chassis maker puts it, usually under the hood. House batteries are often in an exterior compartment or the entry step. Super C motorhomes on heavy truck chassis have their own arrangements.
Class B
Camper vans on van chassis like the Sprinter, Transit or ProMaster. Space is tight. House batteries are often under a seat or the floor, and many recent Class B vans use lithium from the factory, charged by the alternator through a DC-to-DC charger or a second alternator. The chassis battery follows the van chassis.
Towables
Travel trailers and fifth wheels have only a house system, plus a breakaway battery circuit. See travel trailer and fifth wheel battery locations.
Not sure where yours are?
Check the owner's manual, look in exterior compartments near the entry door, or send us a photo and the year, make and model.