smkettner
Southern California
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Joined: 03/21/2005
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Jeezo petes, you guys sure can put three together and make 12v. Although together the third will not add any capacity. So it is just as good to leave the third 6v at home 
OK you could rotate the third battery in position with the other two. Maybe check the specific gravity with a hydrometer every hour to keep rotaing them in position to roughly discharge together. 
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pianotuna
Regina, SK, Canada
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Joined: 12/18/2004
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Hi smkettner,
There would be one other way. Wire all three six volts in series and then use a *really* heavy duty DC to DC converter to bring the voltage down to 12. Ruinously expensive, especially after you custom order an 18 volt converter!!!
Regards, Don
Kustom Koach Class C 28'5" 256 watts solar, 875 amp hours in two battery banks 12 volt batteries 2500 watt inverter.
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sum1
So-Cal
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Joined: 11/07/2005
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As some have said, you can easily configure 3 6V batteries to make 12V. But as others have said, it's an impractical configuration.
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JoeRnCT
Brookfield, CT.
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Joined: 08/14/2005
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AtBatt.com has a 220AH 12 volt battery. If size isn't an issue, check the Sweeper/Scrubber batteries that offer 340/360/380/420AH I might look into these for a home solar project.
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