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Old 05-26-2015, 05:00 AM   #1
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Battery wiring - series or paralell

over the weekend at the Coca Cola 600 while boondocking
my ancient batteries took a dive

I havent used em much since purchasing the 1994 winnebago adventurer 30 ft
I have tested em here and there and they worked fine although they appeared over 5 years old

Well I got set up and needed the generator
it wouldnt start I checked the levels and had 1 bar 9 (less than 9 volts)

so after I got back home I purchased 2 new rv/marine batteries from wal mart
everstart ($90 a pop)

I should have taken a picture but I am almost 100% positive they were wired paralell

but when I go winnebago's diagram it shows them wired in series

I have read paralell is a lot more efficient but I dont want to cause an issue
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Old 05-26-2015, 05:19 AM   #2
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Were the old ones six or twelve volts each? If six, they would be wired in series to get 12 out. If they were twelve, they must be wired in parallel to still have 12 out - unless your coach needs 24v, which I doubt.
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Old 05-26-2015, 05:24 AM   #3
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What Walt said, in Series doubles your voltage, if you bought 2 12volt marine batteries and you wire them in series you are probably gonna end up with problems. Parallel would still be 12volt with more storage.
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Old 05-26-2015, 05:48 AM   #4
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Thanks a lot that makes sense
The old batteries were 12v
Thus being why there were wired parallel
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Old 05-26-2015, 06:10 AM   #5
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First mistake.. Buying the wrong batteries

MARINE/Deep cycle are usually 12 volt packages those are wired in parallel

Six Volt golf Car Batteries is what you should buy.. Those you wire in series pairs (Bat)t(ery) and then you treat them as a single 12 volt (Battery).

Using the number instead of the word search forum or Google for TWELVE volt side of life.
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Old 05-26-2015, 07:43 AM   #6
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Considering I've already purchased these and installed them

I should be good to go right?
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Old 05-26-2015, 08:14 AM   #7
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Yes, you'll be fine with the 12 volt batteries.
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Old 05-26-2015, 09:23 PM   #8
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Originally Posted by BadDogPSD View Post
Yes, you'll be fine with the 12 volt batteries.
I totally agree! With2 12V batteries you keep voltage the same, but double the available amperage. With 2 6V batteries you double the voltage, but keep the amperage of only one battery.
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battery, wiring

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