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Old 08-26-2008
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Need Advice on 6V/12V battery amp hours

Greetings!

As we progress into new areas of the "project" there is more to learn. The vessel is a 48' ketch and it came with 8xT105 6V Trojan batteries/12V system for the house bank. I understand flooded/gel/AGM and the differences but what I'm looking for is the conversion from 6V amp hours to 12V amp hours???

If a 6V battery is rated at 220 amp hours and you place two of these in series creating a 12V system - would the total amp hours be 440 or? Seems 6V batteries have a much higher amp hour rating.. I suspect the total amp hours are going to be 220?

Thank you in advance for your replies!

Last edited by BluewaterBruce; 08-26-2008 at 04:42 PM. Reason: Mispelt
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Old 08-26-2008
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btrayfors will become famous soon enough btrayfors will become famous soon enough
Bruce:

Two Trojan T-105 6-volt golf-cart batteries in series equal a total of 220AH @ 12 volts.

If you connected them in parallel, you'd have 440AH @ 6 volts!

FYI, 8 T-105s in series/parallel for a 48' ketch (for a total of 880AH @ 12 volts) sounds about right in terms of house batteries.

Bill
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