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Old 02-01-2010, 09:48 AM
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Just got my winch on my jeep, thinking about a new idea

so ive been reading about winch amp withdrawl. i have a capacitor for a sterio system in which bacially deletes the dimming of the head lights and killing your battery, so it bacially get a charge from the battery and stores it in the capacitor for use of the winch, then it would have full power.
now would i be able to use that for my winch? does anybody know?
thanks

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Old 02-01-2010, 10:11 AM   #2
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I'm not sure if it'd work or not...but I think you're going to find that the winch sucks all the juice right out of the capacitor on a hard pull. lol

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Old 02-01-2010, 10:40 AM   #3
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Just FAGETABOUTIT

Capacitors are multilayors wound in fine wire, suspendid in a dielectric fluid and depending on the size/mass/Dielectric, they can store multithousands of applied potential (voltage)

They will not produce ANY current and unless our technology has produced a new type of CAPACITANCE --they are Alternating Current (AC) only !!

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Old 02-01-2010, 11:05 AM   #4
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A capacitor is exactly what JIMBOX said, the only thing I would add is that it is a fast discharge battery basically. So yes it would help you out for about 10 seconds and then it will only hurt you. Because at that point it is trying to take power from the battery as well..
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Old 02-01-2010, 12:13 PM   #5
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It won't help.

Capacitors do work on DC. Like any component it needs to be applied properly.

By definition they resist any change in voltage. They can store energy and use it to resist the changes.

Capacitors can also be used in other circuits (like filters) that are not strictly DC.

The stereo application is for short duration large loads that temporarily exceed the capacity of your electrical supply system (think big bass hit). The capacitor will discharge itself to keep the system voltage up, and reduce the dimming.

Winch use is not short duration. Your lights will dim when the winch is loaded heavily. Make sure your battery is in good shape because a winch is a good way to find weak batteries at the worst time.
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Old 02-01-2010, 05:34 PM   #6
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Simple answer, a capacitor is not a good answer for winching. Time would be better spent on ensuring your battery, alternator, winch, and wiring in-between all of those (including solid ground points) are in top shape.

Correction to what's posted above, capacitors *do* work on DC.
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Old 02-01-2010, 11:03 PM   #7
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Capacitors allow for the quick charge and discharge of power, which is great for someone who has an amp and subs, because the beat of your music causes natural demands for sharp surges of power. The capacitor can charge at an even rate and discharge rapidly to provide that extra power you need, which is why your headlights no longer dim to the beat of your music.

If you're really worried about pulling too much power, look into replacing your alternator with one that has a higher amperage rating, but I doubt that's necessary. Anyone with more experience on this last regard please correct me if I'm wrong.
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Old 02-02-2010, 09:02 AM   #8
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Yea, winch's, lights, music sys, etc take so much current, that the full time users have changed alternaters to much higher outputs -160/180 amps and added a dual battery sys

I'm not familiar with the dual battery sys, so no comment and I'm sorry about the capacitor comment, it was mainly aimed at the futility and error in trying to use a capacitor for a high CURRENT application, without extensive electronic mods !!

Most installations that use a WINCH seldom, with little else added to the jeep electrical sys can get by with an alternator change, usually less than $15o bucks

I don't use them either, I've got an OPTIMA "Blue top" GEL battery (mobile) I always carry with me and use it for my boat/trailer/camp, could also be used on Jeep battery failure


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