I picked up a 120W flexible panel, but did not want to stick it to the roof without some sort of air gap. I decided to VHB the panel to twin wall polycarbonate sheet that I reinforced a bit with aluminum C channel on the sides. So far so good, I went to West Texas to visit my mother and hit Palo Duro Canyon, Caprock Canyon, and Coppers Break on the return trip. It did not blow off, so I'm calling it a success. The whole assembly weighs approx. 8.5 pounds, so I like the low profile and low weight aspects.
C channel aluminum on edges
Panel VHB'd to polycarbonate sheet, with threaded bolt through entire assembly, included L brackets on roof.
Panel fending off flying lawnmower.
All connected to Victron energy 75/15 MPPT controller with Victron energy BMV-700 battery monitor. I have the bluetooth dongle and phone app so it is really easy to pull up the app and check your status. So far seems to be working well.
greetings from Texas,
Edited by Alvis, 05 May 2017 - 11:05 PM.