Join Date: Dec 2001
Location: Belleville, Illinois
Thanked 22 Times in 17 Posts
1) Well, a 12-volt system maintains itself with a charging voltage of about 13.5, so I would think that a 24-volt system would want to be at 27 or thereabouts. If that's the voltage you get with the engine running and no load you should be OK. The long-term check is that if you have to add water to the batteries after ten or twenty hours of running, the voltage might be a little high, and if the specific gravity of the acid in the cells is low then the voltage is low and the batteries aren't fully charged. But since you're using sealed batteries you won't have that data, so I'd ask the battery manufacturer what they want for charging voltage and go from there.
2) From what I know about breakers, which is limited, it should trip on DC at pretty close to the AC current that would trip it. The problem is that it's a switch, and switches designed for AC often don't like DC so the contacts burn out prematurely. Maybe someone with more knowledge of the subject will chime in.
3) Shouldn't be a problem running the engine while using the winch. I don't know a lot about electric winches, but most of the times I've seen them being used the operator revs the engine to get the alternator outmut to the max and hold the draw from the battery to the minimum. By the nature of its design an alternator can't put out too much current, so it can't be hurt by working into a big load.