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wild bill

Mira Loma, Ca. USA

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Posted: 11/09/09 12:13pm

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I am a little confused about how to figure total battery amp hours.
I have 6 six volt batteries wired to make 12 volts. The batteries have an amp hour rating of 220 hours each. Do I multiply 6x220 to get
1320 amp hours or since I have 3 banks of 2 6v batteries wired to make 12v is my amp hours realy 660?

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2oldman

Indio CA

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Posted: 11/09/09 12:38pm

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660. You have 1330 at 6v, but 1/2 that at 12v. It's a watts thing.

RJsfishin

Winston Or.

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Posted: 11/09/09 12:47pm

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But only 330 usuable amp hrs, if you hold the 50% discharge rate to prolong battery longivity.

Rich

'98 Flair, 454, Onan Microlite 4k, Intel PD 9155 w/ wizard, Sta-power 1500 watt Inv, 2 6v batts, ammeters, KingDome/sat, Oly Catalytic Heat, hauling 2 Bent Bikes and sometimes towing a Tracker F&S boat.

wolfe10

Texas

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Posted: 11/09/09 12:53pm

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All correct answers.

Brett Wolfe
1993 Foretravel 36' U-240
Cat 3116, Allison 3060

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wild bill

Mira Loma, Ca. USA

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Posted: 11/09/09 01:16pm

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Thanks for the quick replies.

pianotuna

Regina, SK, Canada

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Posted: 11/09/09 09:21pm

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Hi wild bill,

I hope your 6 six volt batteries are wired in a balanced manner. See method #3 here:

correctly interconnecting multiple batteries

wild bill wrote:

Regards, Don
Kustom Koach Class C 28'5" 256 watts solar, 875 amp hours in two battery banks 12 volt batteries 2500 watt inverter.

wa8yxm

Wherever I happen to park

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Posted: 11/10/09 09:03am

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When you wire batteries voltage So six+six =2 volts since they are 220 amp hoed to be identical) you have 220 amp hours.

I am fond of saying "There are no six volt batteries in RVs" even if you and I both have a pair of them.. The reason I say this is the pair of sixes, in series becomes a volt battery for all technical discussions S

Now, if you wire batteries in parallel then you amp hours.. So a pair of G-27's at say 100 amp hours each (These are 12 volt batteries) = 200 AH.

NOTE that when discussing amp hours.. The voltage is not a factor.. That comes in wish to calcualte WATT HOURS. Which we almost never do.

The other thing to remember is you can safely use 1/2 the capacity. You can use more.. but it will shorten time between to the battery store

Nothin adds excitment like something that is none of your business
Kenwood TS-2000 housed in a 2005 Damon Intruder 377