I know the unit your talking about but the 12v side I think puts out 4-5 amps. It would take hours to charge up a car battery. My thinking is 12v 60 amps. to charge batteries/ boost etc. When I'm in the bush I like to run everything 12v on batteries and run a generator for a relatively short time to charge batteries. I just hate having to listen to a 110 v generator run all night.

Keep the Shiney Side up. Support our troops.