24 volt lights on a 12 volt system? - Dodge Cummins Diesel Forum

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post #1 of 6 (permalink) Old 11-02-2009, 07:56 PM Thread Starter
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24 volt lights on a 12 volt system?

so i hope someone out there can answer this! i have three 24 volt HID lights that i got off a rolled haul truck that i would like to put on my service truck so i can have light around it when im working. i have one 12 volt battery in the back for fuel transfer pumps that gets charged of the main engine, and i have the main truck batterys. i thought about just using the welder for it but i dont like listening to that thing run, so how do i make them work?


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post #2 of 6 (permalink) Old 11-02-2009, 08:43 PM
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Not easy unless you run them off their own two batteries or have a way to disconnect the rear battery from the truck and connect it in series with another battery.

Another way to do it is with a small inverter and 24 volt transformer.
You would have to convert the 12 VDC to 110 AC then knock it back down to 24 V.

Either method would probably cost more than just buying 12 volt lights.

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post #3 of 6 (permalink) Old 11-02-2009, 09:20 PM Thread Starter
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ya those two methods are what we came up with to. maybe a second small 24 volt alternator?

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post #4 of 6 (permalink) Old 11-02-2009, 09:23 PM
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you could get a 24volt battery carger and a inverter in the truck run the lights off the carger and plug the carger in to the inverter and the inverter in to the truck if this makes sence

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post #5 of 6 (permalink) Old 11-03-2009, 10:55 AM
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Think a 24 volt alternator would cost much more than an inverter and transformer.
Plus all the mounting and belt routing hassle.

I had to build an automatic irrigation controller in a remote location that ran off a solar panel.
The panel charged a 12 volt DC battery, I needed 24 volt AC for the controller and valves.
Used a cheap 500 watt inverter, you can find them for under $50, and the transformer to knock it down to 24 volts, less than $10.

You could do it the same way, doubt your lights care if they have AC or DC power.

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post #6 of 6 (permalink) Old 11-03-2009, 07:02 PM Thread Starter
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thanks for the replys guys, much appreciated!

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