# AH Question

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Registered Users Posts: 6
I have 24 Deka 6Volt batteries. Batteries are labeled at 190min. I'm trying to figure out how many AH I have. I have 3 banks of 8 batteries in series then each bank parallel for 48v. I called the manufacturer and was told 20amp load for 190min. Somehow that doesn't seem right.

Anyone know how I convert 190min to AH?

Thanks

• Solar Expert Posts: 10,300 ✭✭✭✭
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Re: AH Question

3.16hrs x 20a = 63.33ah. that is a shorter timeperiod than most are rated at for most are for a 20hr timeperiod and the ah goes up slightly as the load amps goes down. some battery manufacturers will actually show the performance over differing timeperiods. if you took the 63.33ah and divided it by 20hrs that gives about 3.167a, but in reality it will be higher and may be something like 3.4a or 3.5a spread out over 20hrs due to the peukert effect and figive me if i misspelled that.
• Registered Users Posts: 6
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Re: AH Question

Thanks Niel,

Found specs online for the model of battery i have 370AH 20 Hr 295AH 6 Hr. Therefore to calculate total AH for my X6048 inverter/charger would I take 370 x 3 for the 3 banks of batteries I have in parallel?

-Kevin
• Solar Expert Posts: 10,300 ✭✭✭✭
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Re: AH Question
utahwilson wrote: »
Thanks Niel,

Found specs online for the model of battery i have 370AH 20 Hr 295AH 6 Hr. Therefore to calculate total AH for my X6048 inverter/charger would I take 370 x 3 for the 3 banks of batteries I have in parallel?

-Kevin

and they told you it dropped down to 20a for 3hrs 10min, aka 63ah? i doubt that.

yes, 3 parallel battery strings at 370ah (standard 20hr rate) is 1110ah total. nice size battery bank.