The factory holes are in the correct place for panels that are never moved
But when you lift one end of the panel the other end goes down
(Think tail swing on your RV)
If the front holes are six inches from the edge of the panel, and the panel is one inch above the roof, you can't lift the back to tilt the panel
Lift the back one inch the front goes down and HITS the roof.
No tilt
Holes closer to the corner, and brackets that hold higher off the roof
Allow the panel to be tilted
You can mount them as is and never move them
But IF you think, you want to clean underneath or tilt them
Planning ahead saves a lot of rework
Using taller brackets, or extensions on the brackets, getting the panels further above the roof alleviate the problem, without drilling new holes in the panels
