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| Most users ever online was 902, 10-29-2011 at 05:09. |
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11-13-2008, 01:45
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#1 (permalink)
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Sergeant Major
Join Date: Nov 2008
Location: Mid TN.USA
Posts: 193
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12v- 24v question
I see a few post saying to buy a 24 to 12 volt reducer. I was wanting to put a sterion in my Deuce, Is there a problem with just pulling straight off one battery and using 12 volts from there( fused) ?
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11-13-2008, 01:48
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#2 (permalink)
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Fleet Admiral/Moderator
Join Date: Jun 2004
Location: Loxahatchee, FL
Posts: 21,037
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Yes, it will create an imbalance between batts and they won't charge right. Every once in a while for short spells and low current draw, no problem. Example, I picked up a deuce in TN. Drove it almost non stop to FL. Had a 400W inverter center tapped to one battery. Once in FL that sucker wouldn't start and no matter how long you ran it, it wouldn't charge. I had to pull it out and charge it separate and that fixed it
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11-13-2008, 02:00
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#3 (permalink)
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Colonel
Join Date: Oct 2008
Location: NE Oregon & SW Idaho
Posts: 262
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For low draw 12 volt items, you can hook up to the center cable that ties your two batteries together in series. Check it with a volt meter, you will get a 12 volt reading. Then you are drawing from both batteries. At least that is what Alex at Idaho Motor Pool tells me, and there is not much about miltary vehicles that he does not know.
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11-13-2008, 05:23
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#4 (permalink)
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3 Star General
Join Date: Mar 2006
Location: Central NC
Posts: 903
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Do a search on a "Battery Equalizer".
Pulling 12 volts off the lower battery is never correct unless you have a way to correctly charge them. Example: On a CUCV, you can pull off the lower battery because it has an alternator to charge each battery.
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11-13-2008, 06:49
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#5 (permalink)
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Colonel
Join Date: Jan 2007
Location: Cleveland Ohio
Posts: 207
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You can go off the center tap for a 12v load, watch your polarities. Low draw only for the very reason stated above. The correct way to do this is allow both batteries in series to equal out the current draw as stated. Voltage dividers / reducers are the correct way to go. Buy one or make one and be done with it.
Weren't you the guy that wanted to put a kicking system in ? Watch the total load of the stereo including amps. You may find your reaching the limits of the Deuce charging system @ 24 volts with a reducer.
I guess you would also have to define kickin.... Do you know the current draw of the system including the amp you want to hook in at 12v ? You may exceed the limit of the reducer. Don't know the specs of the one that Joe (I think it was) posted.
Last edited by TommyG45; 11-13-2008 at 06:51.
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11-13-2008, 07:46
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#6 (permalink)
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2 Star General
Join Date: Feb 2007
Location: Chantilly, VA
Posts: 750
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I've still got a pile of 24v to 12v voltage converters. Mil Spec, very heavy duty 35amp capacity. NOT made overseas crap.
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11-13-2008, 08:03
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#7 (permalink)
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Banned
Join Date: Nov 2006
Location: Gadsden,Al
Posts: 2,738
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How much you want for one or three Wizzy?
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11-13-2008, 08:09
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#8 (permalink)
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Colonel
Join Date: Jan 2007
Location: Cleveland Ohio
Posts: 207
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Hold one for me, how much... maybe I should have asked that the other way around lol
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11-13-2008, 09:06
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#9 (permalink)
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BANNED
Join Date: Dec 2005
Location: cincy, Oh
Posts: 14,570
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I have one of Headwizard's units. They are real nice. Not only do they convert 24-12v, but they can be set up to maintain a 12v battery. WELL WORTH THE PRICE!
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11-13-2008, 09:58
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#10 (permalink)
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Corporal
Join Date: Feb 2008
Location: Fredericksburg, VA
Posts: 40
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I have a hydraulic dump bed kit with a 12v pump and have been wondering how best to run the 12v pump on my deuce as well. I know ideally I should have a 24v pump, but I'd like to use what I have if possible. A separate battery that can be charged off the stock alternator would seem to be an easy way to prevent problems.
Headwizard - will your converter work for charging a separate battery that sees this sort of load?
Thanks,
Lance
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