Trailer mounted battery vs truck mount

Discussion in 'Towing and Hauling' started by Danielle, Aug 29, 2018.

  1. Danielle

    Danielle I'm kind of not allowed any more trucks! Supporting Member

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    I use my car trailer a lot now and need opinions on best way to permanently power the trailer winch.

    Right now I use a marine battery next to the winch on the trailer, then trickle charge that battery occasionally.

    I would like to wire a plug from truck to winch and eliminate the trailer battery, one less thing to steal or forget to charge.

    Should I stick with what I'm doing and invest in a more secure battery box on trailer?

    Or run power from truck to trailer? Third battery? Upgrade alternator? What is a weather safe plug brand?


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  2. DieselDc

    DieselDc Full Access Member

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    If you were to use it all the time, leave it as is and let it trickle charge. If you use it occasionally like me on one of my dump trailers, run the power line to the back. I did nothing special and certainly no upgraded alternator.

    Just one 1/0 12v power back to the bumper with them quick marine connectors.

    Upfront is the quick disconnect for when I’m not using it. It’s close to the battery so I don’t have a fuse.


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  3. DieselDc

    DieselDc Full Access Member

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    If it helps any, great! If not no worries :)

    [​IMG][​IMG][​IMG]


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  4. Danielle

    Danielle I'm kind of not allowed any more trucks! Supporting Member

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    You had me at Amazon haha. Thank you

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  5. subway

    subway be nice to the admin :D

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    while it might be nice to have the power connector on the rear of your truck to plug in things like a inverter, jumper cables or hitch mounted winch. cant you set the trailer battery to charge through the trailer connector while you drive around?

    after that a welded heavy metal strap with some hard to get to bolts should keep your battery safe on the trailer from all but the most the determined tweakers.
     
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  6. 79jasper

    79jasper Chickenhawk

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    Now don't go getting all ethical..... lol

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  7. laserjock

    laserjock Almost there... Supporting Member

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    Amazon also sells ready made wire kits with the Anderson connectors if you don’t want to piece it together.
     
  8. Thewespaul

    Thewespaul Supporting Vendor Supporting Member

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    I set up our gooseneck dump trailer with a battery in the frame next to the pump and motor, it gets a trickle charge from a small solar panel by the spare on the gooseneck. I imagine you could rig something similar with a car hauler. I’ve wired it so the battery is charged by the alternator but ran into issues with overworking the alt in that specific scenario
     
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  9. laserjock

    laserjock Almost there... Supporting Member

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    Correct. If you don’t have a circuit in there to keep it from pulling on the truck through the 7 pole, that could cause problems.
     
  10. u2slow

    u2slow Plan B

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    I ran #2/0 to an anderson connector at my back bumper. That way I can plug in my atv/utility winch (receiver mount) or bridge batteries with my camper unit.
     
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  11. gandalf

    gandalf Senior Member

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    When I had my cabover camper on my '86 I had a dedicated battery for the cabover, mounted in the cabover. I powered it through a Cole Hesse battery isolater. The cabover received power through the isolater, but the isolater would not allow the cabover to draw power from the two truck batteries. Hence the term 'isolater'. I wanted those truck batteries in good shape to start the truck after a week of camping. I ran the power through the isolater to an auto-reset circuit braker, then to the rear bumper to the trailer jack. One of the pins on the jack was dedicated to the cabover battery.

    I think it was Cole Hesse, but it could have been Cole something else.

    Pictures to follow.

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  12. Danielle

    Danielle I'm kind of not allowed any more trucks! Supporting Member

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    My dad had a nice battery box with a new deep cycle and someone cut the wiring and took battery and box while parked at a job site -cuss-cuss-cuss

    I'm going to read up on isolaters, that sounds like a good idea if I do the charging idea and I still have the old truck camper for when just me and the girls...

    So much to think on now, thanks oilburners!
     

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