Question: We only use our RV house battery to start the generator. Normally when we camp, we have provided electricity. When we dry camp, we use the generator. In that case, wouldn't a regular car battery work better for starting the generator rather than buying a more expensive deep cycle battery?
ANSWER Hi Barry, the simple answer to your question is yes, you should always use a deep cycle battery as a house battery in your RV. Here are few reasons why.
1. Whether you use a deep cycle battery or a regular car battery, it will not make your generator start any better.
2. You will end up replacing the car battery frequently. Deep Cycle batteries are designed to be charged over and over. Car batteries are not designed to be deeply discharged and recharged that often. Every time you plug into electric or run the generator, the house batteries are getting recharged. Since car batteries are not designed for frequent deep discharge/recharge cycles, you will be replacing them more often; so you will not end up saving money in the long run.
3. In case of a generator or power failure, it will be nice to know that you can run your RV's 12-volt system for a greater period of time using a deep cycle battery rather than a car battery.
I realize that all of us are trying to save money right now, but in this case, you may very well end up spending more money by replacing the car batteries more frequently.
Now, if your RV has room for more than 1 house battery, the next question is do you want to use two 12 volt deep cycle batteries wired in parallel or two 6 volt batteries in series. Take a look at the video below to find out the answer (which may surprise you).
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