DiploStrat
Expedition Leader
One last try. The shading we are talking about is from other gear on the roof. Way too many folk mount solar panels and then throw away most of the output due to the placement of antennae, air conditioners, kayaks, etc.
I'd mount some 2 pieces of aluminum angle from roof rack to roof rack to create a frame for the panels to sit in. Gives you flow underneath and mounts them rigidly. I hate drilling extra holes in roof.
does the existing panel actually exceed the rack height (picture post #10) or is that just an optical hallucination?
also, fwiw, if you continue to counter everyone's suggestions with negative responses, they'll probably stop trying to help solve the problem which you asked advice LOL.