[Nebster]

I had Newell pull four 10AWG wires from the roof to my inverter bay in preparation for my solar install. The wires penetrate the coach just outside of the inside wall of the half bath. They drop into the half bath and run through a bit of finished conduit around to the corner, where they then drop down all the way to the floor and enter the bay underneath.

My half bath is not a bath anymore, it's an office and pantry, so cosmetically this was an easy way for them to hide the new run. I suspect the "best" place will vary a lot depending on your floorplan (and how much you are willing to tolerate/hide wires).