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Unread 07-15-2008, 09:31 PM   #11
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Default Re: 12v versus 6v batteries in a 36v system

If you really want to use 12v batteries, and have some amps, use 12 v golf cart batteries in parrellel/series. That should get you close to 6-6v in capacity. It would cost a bunch. Probably better to use one bank of 3-12v GC till they run down and then switch to the other bank of 3-12vGC batteries.
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Unread 07-16-2008, 07:07 AM   #12
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Default Re: 12v versus 6v batteries in a 36v system

I tried the 12 volt conversion several years ago and quickly went back to 6 6 volts, no run time whatsoever
Gary
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Unread 07-16-2008, 08:07 AM   #13
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Default Re: 12v versus 6v batteries in a 36v system

Quote:
Originally Posted by garybanjoman View Post
I tried the 12 volt conversion several years ago and quickly went back to 6 6 volts, no run time whatsoever
Gary
Thank You ! There ya'll have it from someone who tried it
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Unread 07-16-2008, 02:38 PM   #14
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Default Re: 12v versus 6v batteries in a 36v system

The 12V batteries are good if you build high voltage because 6Vs would get very heavy but you still have the drawbacks of a 12V battery.
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Unread 07-16-2008, 11:39 PM   #15
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Red face Re: 12v versus 6v batteries in a 36v system

Hey there outback

I figure the lestronic 2 charger should handle it as long as deep cycle batteries are used. The battery stack would still look the same to the charger. There might be a greater current output at first, but the lestronic 2 is fused, should be Ok from what I see.
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Unread 07-18-2008, 10:22 PM   #16
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Default Re: 12v versus 6v batteries in a 36v system

Do you think that you could get at least 3 hours of run time off from 3-12v batteries? I'm trying to make a boat motor out of a golf cart motor and want to run 3-12v 4D marine batteries which are about twice the size of a standard battery. All I would need is about 3 hours max run time. More would be nice but 3 hours would get the job done and it wouldn't be 3 hours continuous. Maybe 30 minutes max at one time.
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Unread 07-18-2008, 10:29 PM   #17
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Default Re: 12v versus 6v batteries in a 36v system

Six 6 volt batteries give 90 minutes of golf cart run time. They weigh 64 pounds each. Amps are stored in lead. More lead = more amp capacity. Six batteries weigh 384 pounds. What do your 12v weigh?
Something else to consider....is the job of turning a prop less strain or draw than the job of moving a golf cart. I think yes.......
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Unread 07-18-2008, 10:36 PM   #18
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Default Re: 12v versus 6v batteries in a 36v system

My 3 batteries are somewhere in the 300lb range. I'm not sure which would be more strain but I talked with a guy today that has been working on them for years. He believes that pushing the boat would be easier but I don't know.
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Unread 07-18-2008, 10:45 PM   #19
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Default Re: 12v versus 6v batteries in a 36v system

My reserve capacity is 390 if this helps.
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Unread 07-18-2008, 10:49 PM   #20
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Default Re: 12v versus 6v batteries in a 36v system

Doesn't help me......But someone who knows more could tell ya. How much draw is the prop / motor?

Alot is gonna depend on your gearing?
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