The support jacks on our motorhome are manual cranks, so I don't know what kind of power draw that would have. Given that it would likely be a hydraulic system, it could draw a fair bit of power. A short causing a fuse being blown could be an issue for sure.
I one of the biggest points of draw down I've seen in the past would be the water pump, like if you had long showers, or if a tap was left ever so slightly on. Either would cause the pump to stay on for a long time. Of course in the latter case you'd hear the pump, and start looking, but I don't know how loud the newer units are. Usually fans, like the stove hood fan or ceiling fans are very low draw, our solar panel has no trouble at all staying ahead of that.
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