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Mr RoC
Member
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# Posted: 8 Aug 2017 17:45
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Hello Everyone,
The original batteries that came with the cabin we bought finally went belly up and we did a complete upgrade with 4 x 250W panel, Midnite Classic 150 and a 12V system for now.
My plans for the new battery set up was 8 x 12V, 130AH in parallel for 1040AH total.
The store I bought my supplies from recommended for the same price and future upgrades and I went with this is 8 x 6V, 260AH hooked up in series for 12V and then parallel. My question is with this set-up is the total AH 2080 or 1040AH?
Just wanted some clarification and thanks in advance for the replies.
Cheers
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ICC
Member
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# Posted: 8 Aug 2017 19:08 - Edited by: ICC
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Connect in series; add the volts and the AH stays the same.
Connect in parallel; add the AH and the volts stay the same
So 12 volts, 1040 AH
FWIW, I'd have done a 24 volt system but then you'd need a new inverter
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Mr RoC
Member
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# Posted: 8 Aug 2017 19:26
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Thanks.
No inverter yet. And it will be reconfigured for 24V when I get the inverter.
Everything in the cabin is currently running on 12v.
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NorthRick
Member
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# Posted: 9 Aug 2017 12:48
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Paralleling batteries in a bank is bad and should be avoided. Over time the individual batteries start to differ on SOC and some batteries get over charged while others get under charged. That leads to early failure of the whole bank.
Lower voltage individual batteries (6v or even lower) connected in series and a higher bank voltage (24v or 48v) are how you avoid parallel connections while keeping the same overall available power.
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