My plan was to mount a 100 watt flex panel on my roof, then have a briefcase one to put out in the sun if I was in the shade. Then I started reading about failures and temp issues, and being the fact that my roof surface will be fiberglass skin epoxied to foam I started to worry about the temp breaking down the epoxy. People have come up with all sorts of ways to get a standoff distance for an air gap. The best I have seen is using corrugated plastic panels.
As much as I still want to just put a 100 watt flex panel on my roof I am not. I am going to make a frame that clamps down on the the frame of a glass panel.This does two things, one keeps a panel on the roof, two when I want to move it out to sun my panel is stored on the roof and providing power while there. So no need for storage, no need for a permanent mounted panel, and I only have to buy 1 panel.
People are free to make their decision on their own, but like using foam and fiberglass panels so I never have to deal with rot. I wont use a flex panel so I dont have to deal with failing, cooking my roof etc etc.
more things for people to read to help with their decision
https://www.gonewiththewynns.com/flexib ... ues-reviewhttps://www.technomadia.com/2014/11/zep ... r-install/