How long will a winch run off a battery with engine stopped?

e9999 · 11-04-09, 12:14 PM

Quote:

Originally Posted by raevenzero

Seems to me like you could use an electric and run a 24v setup just for your winch. It wouldn't take anything to set it up and would theoretically quadruple the length of time you can winch. If you get the batteries low and still need to crank the motor, you can reverse your cables and have 12v with 2x of the amps you have left to crank the motor.

I have a mini truck and have flooded it out in water before (with no winch) and have been pulled out. I cranked the motor and it started after sitting for a little while and me doing a bit of cleaning. I was able to drive it home to make more repairs. If I was alone with and had a winch, I would have needed an electric winch to get me out AND enough left over to get me start.

I have the easy-way-out dual battery system: a starter pack with the junk in the back. I have tested it many times and it's good enough to start the 1FZ-FE several times in a row, plus can be moved around, loaned out, used for tire inflation of far away trailer tires, camping light etc. Perfect for me. Would not be out without it.

jasonmt · 11-04-09, 01:47 PM

Quote:

Originally Posted by e9999

wow. 16 mins off one battery sounds like a lot for 275A.

And you are correct, I fat fingered/fat brained the numbers putting them in. ~7 minutes @ 275A with a 12.7V-10.5V draw-down, ~4 minutes @ 450A under the same prescribed conditions as above.

Back to it being an estimate only and used for comparative purposes as the numbers are based on the BCI 25 ampere reserve capacity test where the battery is a constant 80° F which would not be the case if you are pulling 250+ amps out of the battery.

e9999 · 11-04-09, 10:21 PM

I think that -short of an actual test or more real-life data- we kind of narrowed it down to a few minutes as being the likely output. Not bad actually. Enough to get one out of a pinch. And it would probably help to stop repeatedly after a short time and let things cool down a bit, in order to maximize the pull length.

rusty_tlc · 11-05-09, 09:51 AM

Quote:

Originally Posted by e9999

I have the easy-way-out dual battery system: a starter pack with the junk in the back. I have tested it many times and it's good enough to start the 1FZ-FE several times in a row, plus can be moved around, loaned out, used for tire inflation of far away trailer tires, camping light etc. Perfect for me. Would not be out without it.

How do you recharge it?

e9999 · 11-05-09, 10:58 AM

Quote:

Originally Posted by rusty_tlc

How do you recharge it?

with 120 AC or 12 DC...