Originally Posted by Wuffo
How goes the project? Joist Diagram?
I would assume two parallel rails, running the length of the roof, with stand-offs from joist to joist, might be a possible frame to support multiple panels on a tilting plan.
How are you going about the project?
There is no such thing as a Joist diagram, at least on my camper the rafters are 16" on center. Once you find the first one, the rest can be found with a tape measure.
I doubt you can run rails the lenght of the roof, with all the stuff on the roof. Placement is where ever you can make it fit and what the easiest way to route the wire. I've got one panel in front of the AC and one beside it. This allowed me to go straight down into the wall cavity that the controller would be installed in.
My panels are mounted using the standard Z-mounts, the attatching point is 32" on center, so it centers on the rafters. Tilting panels can be done, but all of them that I have seen require a lot of manual adjusting. Just one more thing to setup and take down. It would be OK if your setiing up for a long stay.