For what it’s worth, I had the “expensive” Sunpower panels and they burned. There’s some combo issue here where water gets trapped underneath, a section of the panel shorts (maybe shading related), and then the heat from the short is really efficiently conducted into the roof, damaging it as the panel blows.
After two panel failures and a roof overheat, I built a rack to float my remaining flexible panels off the roof. No issues after that, but now they weigh and cost more than hard panels. ¯|_(ツ)_/¯
Curious how well the Xplor holds up.
You are probably already considering this, but I’d suggest for your temporary mounting of the panel, mount with as little tape as you think will hold it, just to make it easier to remove.