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Old 05-14-2013, 02:47 PM   #1
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12 & 6 Volt battery

I have two 12 volt deep cycle batteries on a solar panel to power my RV, One of the batteries is bad and needs to be replaced. Can I
1) just purchase one battery and replace the bad one?
2) purchase two 6 volt ones and use them with the good 12 volt battery? With plans to mive to all 6 volt batteries.
3) Do I take out a second mortgage and just buy four 6 volt batteries?
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Old 05-14-2013, 04:13 PM   #2
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Quote:
Originally Posted by Waggy View Post
I have two 12 volt deep cycle batteries on a solar panel to power my RV, One of the batteries is bad and needs to be replaced. Can I
1) just purchase one battery and replace the bad one?
2) purchase two 6 volt ones and use them with the good 12 volt battery? With plans to mive to all 6 volt batteries.
3) Do I take out a second mortgage and just buy four 6 volt batteries?
If you have room for four 6V batteries, that is the ultimate fix.
Having said that, you can do whatever your budget fits as long as you wire correctly.
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Old 05-14-2013, 04:57 PM   #3
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You don't say if both batteries actually run the coach or if one is the house and one for starting. If both are for running the house then it is better to replace them about the same time.
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Old 05-14-2013, 09:44 PM   #4
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Replace them all

Don't replace half of your battery bank. Replace it all. If you only replace part of it ( particularly with a very different battery, like two 6V batteries ) you'll have discharge issues and reduced life of all the batteries.

Bite the bullet, buy four 6V batteries if you have the space.
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Old 05-14-2013, 09:50 PM   #5
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Costco & WalMart

Both Costco & Walmart sell perfectly good 6V golf cart batteries for less than $100 each. I've been using 4 of them for a couple of years with no problem.
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Old 05-14-2013, 10:11 PM   #6
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Very few 12 volt batteries are true deep cycle and if yours are they are big, heavy and expensive. Most people confuse marine batteries with deep cycle ones. They are not true deep cycle like the 6 volt golf cart ones are.
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