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Old 08-28-2012, 06:13 PM
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12 volt to 24 volt

Here's my problem my buddy hooked me up with four trucklite lights the LED ones except they were for military vehicles an those use 24 volt systems any way to hook these lights up? With two batteries? A converter? Any help is appreciated!

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Old 08-28-2012, 06:46 PM   #2
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I think the easiest way to use them would be a 12vdc to 24vdc step up converter. Make sure it can handle the amp draw, as well as all wires used, particularly the 12v side. I imagine itll put a serious draw on your alternator. If you intend to use them a lot, you may want to think about upgrading it or adding a second battery as a capacitor to your system (keeping it 12v).

You could use two 12v batteries wired together, isolated from your 12v system. It wouldnt recharge unless you installed an isolater as well. Lots of $$$ this way, though.

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Old 08-28-2012, 06:50 PM   #3
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I have the truck-lite phase 7 LED headlamps, they are freaking amazingly bright! I am pretty sure most of their products are multi-volt design, meaning they can accept 12 or 24 volts. Looking at their online catalog, it looks like the military models are not, they come in either 12 or 24 volt. If I were you, I would sell them and use the money you get to purchase the standard versions that will run off 12 volt systems.

You *could* wire two 12 volt batteries in series to attain your 24 volts, but you would need a total of three batteries in the Jeep to do it, two for the lights, and one for the standard 12 volt electrical system. Probably not worth the time or money.
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Old 08-28-2012, 06:51 PM
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Well even just two of them. Would it wear out the altenator? I would most likey only use them when the jeep is on. And how much is a step up converter? Any good brands? And instructions on how to hook up?
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Old 08-28-2012, 06:56 PM   #5
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Found a link providing a 12v DC to 24v DC converter that supplies 12 amps of current at 24 volts. Not sure how much current the lights you have will draw, but 12 amps isn't much. They want 150 bucks for it too.
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Old 08-28-2012, 07:00 PM   #6
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Quote:
Originally Posted by Dunaj267 View Post
Well even just two of them. Would it wear out the altenator? I would most likey only use them when the jeep is on. And how much is a step up converter? Any good brands? And instructions on how to hook up?
Two of what? Your jeep's electrical system needs 12 volts to run, not 24. If you were to use your existing battery and wire it together in series with a second battery, you would be giving your whole Jeep 24 volts. It would be the simplest to just use three total batteries, two for the 24 volt system, and then leave the original battery as it is. Now as BlueRidgeYJ said, charging the two batteries that you use to get the 24 volt system would be difficult and expensive.
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Old 08-28-2012, 07:08 PM   #7
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Maybe I should be more opinionated - I agree with eboven, it would be far easier to sell them and get 12v lights that provide the same lumens at a lower current draw. It CAN be done, and thats how.

There are two ways to wire batteries together, series and parrellel. One gives 12v with twice the capacity, one provides 24v with normal capacity, essentially a 24v battery. If you put a 24v battery in your car as it is, instead of your battery, youll see lots of parts start to smoke.
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Old 08-28-2012, 08:04 PM
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I understand I meant two lights. Yeah maybe the best way is to sell them
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Old 08-28-2012, 08:11 PM   #9
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Its not really a common thing. The military doesnt use 24v so it can have brighter lights, its an adaptation to big truck built vehicles, which use 24v.

If you want the "Hey, I got milspec lights" factor, check your amps, find a converter and go for it. Itd be a mathmatical install though. And a bit expensive.
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Old 02-16-2014, 08:10 AM   #10
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Old 02-16-2014, 08:59 AM   #11
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I have owned several of the chevy military pickup trucks.They have a split 12/24 volt system.The starter is 24 volt so that it can jump or be jumped by other vehicles and to power other equipment.Everything else on the truck itself is 12 volt.These trucks use two 12 volt batteries wired in series with everything that is 12 volt powered by the last battery in the series.This battery is charged by a conventional alternator.The other battery has it's own alternator that does not ground through the body of the alternator but it's ground is tied directly to the negative post on this first battery.I think that using different lights would be by far your least expensive route..
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Old 02-16-2014, 12:04 PM   #12
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That won't work for powering 24 volt lights from a 12v electrical system. That device was made for powering small low-current 12v devices when the vehicle's electrical system is 24v. Note it says 24v in, 12v out. Though this is a 2 year old thread so it's a moot point by now.
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Old 05-25-2014, 07:28 PM   #13
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I also have four of these, trucklite led 24volt military lights. Brand new, unused. Went through the same thing. Can not find an inexpensive way to make them work. I think I will sell them and buy some Lightforce lights and be done with it.

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