Battery Question - Fiberglass RV


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Old 12-09-2011, 11:34 AM   #1
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Battery Question

If I have two 6 volt batteries that provide 220 AH each, does that give me 440 AH at 12 volts, or just 220 AH?

Noel
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Old 12-09-2011, 11:40 AM   #2
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220 is the answer
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Old 12-09-2011, 11:40 AM   #3
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If I have two 6 volt batteries that provide 220 AH each, does that give me 440 AH at 12 volts, or just 220 AH?

Noel
Your two six volt batteries in series will yield 12 volts at 220 AH. I wouldn't say just.. Raz

Norm is faster than I am!!
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Old 12-09-2011, 04:48 PM   #4
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Thanks... I though as much, but wasn't sure.

So, is there any advantage to having two 6 volt batteries over having one 12 volt one, if the total AH is the same?

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Old 12-09-2011, 04:55 PM   #5
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Noel,
As a rule of thumb battery capacity is related to the weight of the battery (the lead and acid).

The reason for using two 6 volt batteries in series is to increase the available amp hours and to still be able to physically handle the battery.

A single 12 volt battery with 220 amp hr capacity could be made and may be available. The problem is that a single 12 volt battery with this capacity would weigh about 140 lbs.
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Old 12-09-2011, 04:57 PM   #6
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Thanks... I though as much, but wasn't sure.

So, is there any advantage to having two 6 volt batteries over having one 12 volt one, if the total AH is the same?

Noel
For the capacity involved what first comes to mind is weight. If I am not mistaken aren't those batteries about 100 lbs. each? Imagine if they were in one package.
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Old 12-09-2011, 05:06 PM   #7
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OK. That makes sense.

Thanks, all.

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