Am a new owner of a 2008 Holiday Rambler 40PLQ and am about to go down the rabbit hole of putting a bunch of solar panels on the roof. I am looking for any insights on where any wiring or important stuff may be run just under the fiberglass/Luan board, so I donβt hit anything. Instead of screwing down each panel individually, my gameplan is to lay down long runs of aluminum strut channel that panels will mount to. Plan is for one strut channel rail to run along the outside edge, just before the roof edge curve starts, and another run roughly a foot from the air conditioner housing. I may also have a set towards the middle, in-between the air conditioners, with strut approx. running length-wise roughly 1-foot either side of the coach centerline.
While this may start a flame-war on attachment methods, my current plan is to bond the strut channel to the roof with polyurethane adhesive (Sikaflex 292i??). Then after curing, increasing adhesion safety by using speed shop rivets https://www.amazon.com/dp/B09ZBLVJFF every few feet. My thinking with the speed shop rivets is that the fingers will spread the load below the fiberglass/luan to hopefully prevent any type of tear-out and reduce chance of adhesive de-bonding, while having a very small penetration hole. That I think would be better than screws, well-nuts, or other mollies that take a big hole. Anyone see a flaw with this plan?