![]() If batteries are connected in parallel they will retain their voltage, but if they are connected in series the voltages will add up. Whenever you connect multiple batteries together you have to make the proper connections in order to maintain 12 volts. ![]() RV electrical systems are 12 volt systems. This can vary and some smaller coaches may only have two, while larger coaches may have as many as eight batteries in a bank. Most coaches will have four deep cycle batteries in a battery bank to ensure that there is enough capacity to supply adequate power over a longer length of time. Deep cycle batteries are designed for maximum performance by slowly draining amps from them and sustaining this draw over a longer period of time. For this application deep cycle batteries are used. They will draw fewer amps than a starter motor but they will do that over a longer period of time. When camping, your coach electrical systems operate quite differently. Most diesel motorhomes will have two engine-starting or chassis batteries in order to crank these larger engines. The key here is that they dump a lot of amperage in a short time, then rest for a while slowly getting recharged. They are designed to output a large burst of amperage to start the vehicle, then slowly recharge from the vehicle’s alternator. Automotive batteries are what you have in your car. ![]() There are two types of batteries and each type has a different intended use. To do this, multiple batteries are arranged together into a battery bank. A single battery may be fine to operate your passenger car but it’s just not enough power to handle the more advanced requirement of an RV. ![]()
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