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Military MEP and Aircraft Gen-Sets

Interesting---12 Volt Lights off 24 Volt Generator MEP=016b


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  #1  
Old 10-15-2009, 06:35:59 PM
SDHomesteader SDHomesteader is offline
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Default Interesting---12 Volt Lights off 24 Volt Generator MEP=016b

Well I was fooling around with my Back up systems today.

I have 12 Volt RV Lighting running throughout my house and had planned on getting 4 Deep Cycle Marine Batteries to run them along with a Small Solar Cell Setup to recharge the batteries. Just out of curiosity I hooked my 12 volt Lighting system set up, up to the Generator Batteries that are used for Starting. Started the ol beasty up and Low and behold my 12 volt light that I have set up ran just fine off the 2 12 volt Batteries I have setup for starting my generator. Ran the lights for about half an hour and no burn out bulbs or anything.

So I guess that means I won't need to spend the extra Money on 4 Marine Batteries and a Solar Cell Hookup.

The other thing I noticed too was there was no Dimness or Brightness difference in the bulbs versus having them hooked up to a single 12 volt versus 2 12 volt in 24 volt configuration. AM I mistaken as to there being a Brightness variation in the bulbs versus the two different voltages, the bulbs themselves are labeled as 12 volt bulbs??
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Old 10-15-2009, 07:02:42 PM
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John Newman Jr. John Newman Jr. is offline
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Default Re: Interesting---12 Volt Lights off 24 Volt Generator MEP=016b

Are you sure you nave the two 12V batteries connected in series (for 24V)? If there is no difference in the brightness of your 12V lightbulbs when switching from one battery to two, you may have them connected in parallel - Which would double the available amperage, but the voltage would remain the same. My experience with 12V light bulbs is that they don't like 24V.
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Last edited by John Newman Jr.; 10-15-2009 at 11:50:43 PM.
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Old 10-15-2009, 10:04:45 PM
Ironsides Ironsides is offline
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Default Re: Interesting---12 Volt Lights off 24 Volt Generator MEP=016b

You guys must have better bulbs than we can buy in Australia as 24 volts blows 12 volt globes here as soon as you turn them on keep cranking,Norm
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Old 10-16-2009, 10:00:48 AM
SDHomesteader SDHomesteader is offline
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Default Re: Interesting---12 Volt Lights off 24 Volt Generator MEP=016b

Umm if I had them hooked up Parallel then my Generator wouldn't Start up Right.

Yes I have them in Series, lol, Positive to negative, Not Positive to Positive such as jumping a car LOL.

I also tried it with my 12 Volt Big Bulb as well and didn't notice a Difference in the Brightness on that bulb either. As in Big Bulb I mean Regular Household Size Incandescent Light bulb, Got a couple of them for Drop Light use while working on the car, these are 75 Watters but no difference in brightness on them either wether hooked up to one of my batteries or Both Batteries in Series.
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Old 10-16-2009, 10:23:45 AM
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Default Re: Interesting---12 Volt Lights off 24 Volt Generator MEP=016b

Ok now I am baffled to all hell and back lol

I went out with my voltmeter this morning to check the voltage. It says 12volts.

I have the Positive wire from the generator atttached to the positive terminal on the First Battery, a Jumper Wire from the negative terminal on the first battery going to the Positive Terminal on the second Battery, and the Negative Terminal on the second Battery going back to the Generator. This IS a Series Connection is it not??? Why the hell is it reading 12 Volts and WHY is the Generator even starting up with just a 12 volt reading. Both Batteries are Brand New Exide 24-84N's.

I am sooooo confused.
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Old 10-16-2009, 12:53:08 PM
pegasuspinto pegasuspinto is offline
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Default Re: Interesting---12 Volt Lights off 24 Volt Generator MEP=016b

i think a picture might be in order here, get a few clear pix of your setup
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Old 10-16-2009, 03:50:28 PM
Kimbra Dean Kimbra Dean is offline
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Default Re: Interesting---12 Volt Lights off 24 Volt Generator MEP=016b

Measure the voltage of each battery individually, maybee this will tell you something.
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Old 10-16-2009, 06:18:11 PM
Rich Mc Rich Mc is offline
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Default Re: Interesting---12 Volt Lights off 24 Volt Generator MEP=016b

The operating life of a lamp filament is inversely proportional to the voltage to the 3/2 power.
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Old 10-16-2009, 06:41:12 PM
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Default Re: Interesting---12 Volt Lights off 24 Volt Generator MEP=016b

Ok nevermind, I feel so damn stupid today, must be from lack of sleep LOL

I took a nap and went back out and measured across where the two cables from the generator hook up and I get 25 volts. When I measured this morning I measured across the terminals of one battery instead of across both batteries LOL.

My 12 Volt Lighting setup is connected to only one of the batteries at the positive and negative terminals and not connected via the one terminal per battery (where the generator starter lines are).

Man I really need to get sleep before I work on stuff LOL. SO yeah My 12 volt lighting is set up as 12 volt lighting since its only hooked up to one of the 2 batteries.
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Old 10-16-2009, 06:46:44 PM
pegasuspinto pegasuspinto is offline
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Default Re: Interesting---12 Volt Lights off 24 Volt Generator MEP=016b

you can't run it simply like that-you will run the one battery flat, and the other one will boil dry trying to charge

Robert
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Old 10-16-2009, 08:56:53 PM
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Default Re: Interesting---12 Volt Lights off 24 Volt Generator MEP=016b

The only time the 12 volt lighting is running is when the generator is running, I'm not running it while the generator is static. If I need to do that I will most likely end up getting the Marine Deep Cycle Batteries and hook them up in parallel. Because I still want to get that Solar Panel Kit and have that eventually turn into my full time Lighting system.
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