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Old 06-20-2019, 06:12 PM   #1
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Batteries

Whats the preference among RV'er 2 6volt or two 12 volt in parallel.



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Old 06-20-2019, 06:50 PM   #2
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2, 6 volt in series. Almost all 6 volt batteries are deep cycle. Its hard to find 6 volt starting batteries.

Not so much with 12 volt batteries. Most are not deep cycle, but a dual purpose mix.
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Old 06-20-2019, 07:56 PM   #3
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6 volt deep cycle batteries, often called golf cart batteries, are designed for many low amperage longer term discharges. 12 volt batteries are generally designed for high amperage short term discharges. It has to do with the design of the plates inside the battery.

Your car uses a short term high amperage draw to crank the motor then immediately recharges via the alternator. For this use a "starting" battery is appropriate. Your RV has some lights, a fridge, maybe a tv, etc. These items use relatively small amounts of amperage over a long term so a deep cycle battery is appropriate.

There is a compromise battery, a 12 volt "deep cycle" or more often "marine" labelled battery. These are a compromise between a true deep cycle and a cranking amp battery.

Most RV'rs use the 6 volt true deep cycle battery for their "house" bank. And will have a "chassis" battery to start the engine and run the chassis items. For trailers/5rs/etc with no engine of their own, a house setup, deep cycle, is appropriate. Depending on the size of the RV and its specific use, there can be multiples of each battery type. On my MH for example, I have two 12 volt starting batteries (wired in parallel) for the chassis side. On the house side I have four 6 volt batteries (wired in series/parallel) for the house side. Other rigs may have 8 or maybe even more batteries on the house side.

Since we don't know anything about your RV or proposed RV, a general explanation is all we can provide.
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Old 06-28-2019, 08:59 AM   #4
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6v batteries are better for storage. But when it comes to price you can get a 12v so much cheaper and the difference is so relatively small. I mean lithiums are on the market today that are some top notch batteries but I have had deep cycle batteries for years. My money has been best spent on the old Wally worlds deep cycle biggest bang for the buck. Size 27 if it fits size 24 if its the small slots. The most important thing about a battery is to keep the charge on it and it will last you much longer.
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Old 07-05-2019, 10:09 PM   #5
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Another convert to two 6v house batteries. We picked up a pair of Duracells from BatteriesPlus for a very reasonable price. Very satisfied.
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Old 07-05-2019, 10:28 PM   #6
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If only room for X's 2 - and willing to spend some more coin, check the Trojan T1275 12V batteries. 300AH provides more AH's then conventional 6V GC2'a...

And, cost more too!

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