I suppose you were using the original 4 light meter for checking the capacity. You can't really tell much truth with that.
Sounds like all the slide equipment was working okay, since it worked when you connected truck power.
Question is, why was your power level so low after only one day of dry camping. Did you consume a lot of power? Is your converter doing a good job of charging? When had you last connected to power for the charger to work?
An inexpensive voltage meter tacked on the wall can really help diagnose these things. The factory battery gauge, not so good.
We dry camp a lot, and as a matter of practice I do my landing gear adjusting, and sometimes even my slide operation, while my truck is still connected to the trailer cord. Those motors draw a lot, so if I want to conserve power for dry camping I might as well let my truck share the load as much as possible. It is better for the motors too if they get plenty of juice. Low juice means they get hotter.
