The problem with those panels (and all "flexible" panels) is that they have no airflow underneath them, and heat is the enemy of efficiency with solar panels. Normal "hard" glass panels are mounted so air flows underneath, keeping the temperatures down. Putting them on top of a super hot hood makes for a double hit. Also, the plastic they're coated with isn't as transmissive as glass.
Efficiency aside I'd avoid flat mounted flex panels because I've seen them burn the surface they're attached to.
Efficiency aside I'd avoid flat mounted flex panels because I've seen them burn the surface they're attached to.






