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Old 06-21-2011, 10:16 PM
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Can my battery handle it?

I have a 95 YJ and just recently ordered 2 pair (4 total) 100 watt KC HiLiTES. I'm concerned that with my 2 stock fog lights already in place my battery will not be able to handle it. I'm not very good with this kind of stuff so I thought you guys could help. My battery is an Interstate Mega-tron plus and like I said I will have a total of 6 lights not including my headlights or blinkers and eventually a winch down the road haha. I'm not sure how old the battery as I bought the jeep the current battery.

If you guys could provide any input that would be great!

Here's a link to the battery: Interstate Mega-tron plus

Here is a link to the KC HiLiTES

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Old 06-22-2011, 03:56 PM   #2
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i had 4 5x7 150 what kc lights, stock fogs, and headlights, on my old lj and it took it fine, the kc's dimmed a bit at idle but just barely

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Old 06-22-2011, 04:00 PM   #3
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It's the alternator that is supplying the juice while running, even when you run your lights directly off the battery. That's why they get brighter when you step on the gas. The alternator is constantly charging the battery and powering all the other accessories when your Jeep is running. Too much current draw, and the alternator can't keep up with demand.
Look into an upgraded alternator, your battery is fine.
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Old 06-22-2011, 11:58 PM
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Alright I will thanks for the advice!
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Old 06-23-2011, 12:03 AM   #5
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x2 on the alternator....had an 88 YJ with 5 KCs up top and two on the bumper...they wouldnt light up to their potential with a stock alternator...
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Old 06-23-2011, 07:15 AM   #6
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Alright I will thanks for the advice!
My pleasure. I forgot to mention, DO NOT use an underdrive (larger than stock) alternator pulley. Make sure if your replacement alternator comes with a pulley on it, it's the same as the one on your current alternator.
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Old 06-23-2011, 07:29 AM   #7
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High beams (60w x2), fog lights (55w x2), KCs (130w x4), cheapo lights (150w x2) flood lights (55w x2)... I've run all this at once on my TJ... about 1160w... I think you'll be fine...
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Old 06-23-2011, 08:59 AM   #8
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I have 4 100 watt lights, and a winch running on stock alternator but upgraded to a blue top optima.
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Old 06-24-2011, 10:22 PM
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High beams (60w x2), fog lights (55w x2), KCs (130w x4), cheapo lights (150w x2) flood lights (55w x2)... I've run all this at once on my TJ... about 1160w... I think you'll be fine...
Haha sounds good. I'll check to see if they dim when they are all on vs just 2 in order to decide before I purchase something else... Even if I had $10,000 I would still not have enough to satisfy my craving for upgrading my jeep.
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Old 06-24-2011, 11:25 PM   #10
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I think you should be fine if you don't run all of them at the same time. If you intend to, getting yourself a higher output alternator certainly will not hurt

Quote:
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It's the alternator that is supplying the juice while running, even when you run your lights directly off the battery. That's why they get brighter when you step on the gas. The alternator is constantly charging the battery and powering all the other accessories when your Jeep is running. Too much current draw, and the alternator can't keep up with demand.
Look into an upgraded alternator, your battery is fine.
If that is happening, then you have an electrical issue. The alternator can supply voltage spikes up to 18 volts while the vehicle is running. It is the job of the alternators voltage regulator to keep the voltage at a safe level (right around 13 volts) to keep your battery charged, and your lights running at a constant brightness level.

Your lights should not dim or brighten with engine RPM, because the battery should supply a constant voltage to your lights. The only time they should dim is during starting, because your starter is sucking a HEFTY load out of the battery (300+ amps).

If they brighten with engine rpm, then your alternator is going out.

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