There are different battery types for very different purposes. In this article we will be referring to the
"chassis" battery and the "coach" battery. A "chassis" battery starts the engine and runs the automotive systems in
either the motor home or the tow vehicle. A "coach" battery powers the lights, furnace, water pump and other 12
volt devices in the coach.
Engine Starting battery - this type of battery is constructed to supply a high amount of current in a short
amount of time, as when starting a cold engine, and then it is recharged immediately by the engine alternator. The
internal plates are thin to allow more contact area with the acid solution. This allows a great amount of chemical
reaction to take place in a short period of time. The starting battery does it's job very well but will perform
poorly as a coach battery.
Marine Battery - this type of battery is constructed in a similar way as the starting battery but the internal
plates have more support built in to withstand the pounding of a boat going over rough seas. This battery is
required to provide high current to start the boat engine, so it is essentially a beefed up starting battery.
Deep cycle/RV battery - this type of battery is built to supply relatively smaller amounts of current for
relatively long periods of time without being recharged immediately. The internal plates are thick and robust to
supply this continuing current but the power is distributed over a longer time span. A deep cycle battery will
require a longer recharge time at a lower current level to be fully and safely recharged.
More on connecting multiple batteries in the next weekly tip!
Hard to reach your batteries?
Remote battery watering systems lets you fill all batteries to
proper electrolyte levels from a single fill tube, using a simple hand pump. Safer and more accurate than
More RV Tips.
More info on RV batteries