Help with designing a roof solar panel mount. I’m looking to mount four solar panels on the roof. Somewhat similar to this. Two panels would be fixed on the roof. The other two panels I want to hinge so that when traveling, they fold down over top the fixed panels. When in camp, I can unfold them and they can be positioned in any position from 90 degrees down through 270 degrees which would be flush with the wall which would be similar to the picture.

This would allow me to angle the unfolded panels to the best angle for the location.

I saw the 180 degree flexible angle. But how do I achieve a 270 degree range of motion?

Thoughts?