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dc electric question #7847931
04/18/23 10:41 AM 04/18/23 10:41 AM
Joined: Dec 2007
Posts: 1,453
Missouri
ol' dad Offline OP
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ol' dad  Offline OP
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Missouri
If I have a 4 amp hour 24v battery and step it down to run 12 volt led lights, does it increase the amp hour (run time)?

Thanks

Ol' dad

"I season my food with hunger"
Re: dc electric question [Re: ol' dad] #7847937
04/18/23 11:00 AM 04/18/23 11:00 AM
Joined: Jan 2012
Posts: 3,027
Ohio
OhioBoy Offline
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OhioBoy  Offline
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How are you going to step a 24v battery down to 12v?

Typically the more batteries you add make it last longer two 12 volt batteries in parallel last longer than one 12 volt battery but I'm not sure that's what you are asking.
Re: dc electric question [Re: ol' dad] #7847953
04/18/23 11:29 AM 04/18/23 11:29 AM
Joined: Jan 2013
Posts: 165
Pennsylvania
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Tim64 Offline
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Tim64  Offline
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Pennsylvania
If you are reducing the voltage with a DC to DC converter you will also increase the run time. If you are simply trying to power the 12v lights with the 24v battery you will increase resistance and burn the lights out.
Re: dc electric question [Re: ol' dad] #7847967
04/18/23 12:04 PM 04/18/23 12:04 PM
Joined: Aug 2010
Posts: 386
Ontario
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Kermit Offline
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A lot of equipment lights run on 12 to 24 volts. No parasitic loss
Re: dc electric question [Re: Tim64] #7848029
04/18/23 01:56 PM 04/18/23 01:56 PM
Joined: Dec 2007
Posts: 1,453
Missouri
ol' dad Offline OP
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ol' dad  Offline OP
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Originally Posted by Tim64
If you are reducing the voltage with a DC to DC converter you will also increase the run time. If you are simply trying to power the 12v lights with the 24v battery you will increase resistance and burn the lights out.


Tim, thanks. That is what I'm doing. I have some extra 24v lithium ion power tool batteries that i don't use. I currently power my 12v cargo trailer lights with a deep cycle marine battery. I bought a 24v to 12v step down converter and plan to power them with a 4 amp hour 24 volt battery. ( I can eliminate the 80lb deep cycle) Each of the three lights only draw .25 amps, so my question is will I have 5.33 hours of run time, or will it increase since I'm lowering the voltage?

ol dad

"I season my food with hunger"
Re: dc electric question [Re: ol' dad] #7848119
04/18/23 04:15 PM 04/18/23 04:15 PM
Joined: Jan 2013
Posts: 165
Pennsylvania
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Tim64 Offline
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Tim64  Offline
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It will increase run time but It will not double due to some slight power losses with the use of the converter.
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