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post #11 of 12 Old 03-15-2012
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Re: Replacing 12 volt batteries with 6 volt

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Originally Posted by justonemoreproject View Post
OK. I got 2 6v batteries. I saw some diagrams that showed 4 batteries connected both in parallel and series. Can I do that with just 2 6v and is it a good idea? Also, one of the 12v i have might still be a little tired but still working. Can I use that as a starting battery even though its worn? By the way, my switch is Blue Seas Dual Circuit Plus that is connected to a Blue Seas Battery LInk ACR. I can set it charge to any rate I want to. I guess that I should change it to a different voltage for the Trojans!
As hellosailor said you can't connect in series and parallel only with a pair. You need 12 volts so use the series connection shown below.

There is not a charge setting on a Blue Seas ACR. When it sees a voltage of 13.6 for 30 seconds or 13.0 for 90 seconds it closes to combine the battery banks in a parallel connection. It opens to separate the banks when the voltage drops to 12.35 volts for 10 seconds or 12.75 volts for 30 seconds.
When closed both battery banks are treated as one larger bank.
There is not an adjustment of any kind for charging rate. Best you read the manual.
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Re: Replacing 12 volt batteries with 6 volt

Thanks, I'll be sure to take my ring off. One more question, my old battery is an AGM. If its in its own bank, is it OK to use it with the new 6v flooded, or does the "don't mix different battery compositions rule still apply?

Thanks - Larrt
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