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Join Date: May 2008
Location: Colo Springs, Colorado
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Quote:
Originally Posted by Orange County C
I want to remain at 24v. So I can wire them up as I describe but I won't add any distance. Can you explain why?

CrimsonsnakeO is correct, but maybe hard to follow?
Three 12 volt  12 amp/hour batteries can be wired three ways;
1) Parallel, giving you 12V and 36 amp/hours capacity.
2) Series, giving 36V and 12 amp/hours capacity. (Fig.2)
3) Parallelseries, giving you 24V and 12 amp/hour capacity. (Fig.1)
Your amp/hours are limited to the smallest/weakest battery in your series. If you had four 12V 12amp/hour batteries wired 2parallel, 2series, you would have 24V 24amp/hours of battery capacity, doubling what you have now. Adding one battery to your two doesn't improve things because the one 12V 12amp/hour battery in the series runs down in use at the same rate it always did, and then becomes a big resistor when dead, that you can't push the remaining juice in the parallel set through.
Hope this helps.
