Originally Posted by
sawmilleng
Voodoo,
It seems to me there is an instructional thread on SMF where a kind soul gave us a bit of a run-down on repowering a small UPS with bigger batteries.
But you could do the same thing by finding a small UPS that worked off 12V batteries. Toss the old batteries (they are probably toast anyway) and hook the UPS into your vehicle battery. Bingo! Free 120V to plug your tool charger into.
The only thing you need to be careful of is that the UPS works on 12V. If its a small one, you probably can arrange it to plug into your ciggy lighter, although I don't know how many amps a ciggy lighter is rated for. But the tool chargers are a pretty small load.
Jon.
Most Cigarette lighters are run on a 30amp fuse. Not sure what kind of amperage a UPS converted into a convertor would pull. But I'd probably hook mine up like this.....
Go to the battery of your truck and run a 2 or 4 gage wire from the positive battery terminal (With a large fuse found at any car audio shop) THROUGH the firewall into the cab. Run it under the carpet (or rubber matting) to the back of the back seat.
Run the wire to a 50 amp relay.
And hook the Convertor up to the other side of the relay
Run a switch with power, in/under your dash to the relay.
PRESTO!! You can safely run your convertor, and have remote control over the power of the unit.
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