I built a roof rack for our 2005 Chevy Astro Van. It incorporates a space for two 100W solar panels, a cargo area and an upper deck that allows longer items to be carried. The rack is currently held to the original Astro roof rails with hose clamps and can be removed completely if needed.
I am including lots of detail shots so you can see how the panels are attached. That was the trickiest part. They ended up very close to the surface of the roof which is what I wanted. The upper bars do shade the panels a bit which is unfortunate but I really wanted a way to carry longer items on the rack without damaging the panels. Hopefully eventually even a canoe.
I plan to revisit soon and add front and side lighting to the upper bars.
Let me know if you have any questions.
The following video was a great resource and gave me courage and inspiration to get started with this build!!!
https://www.youtube.com/watch?v=y1xPUKhk38g&ab_channel=HanginwithHerky