> solar panels don't like being hot. For boats there's flexible panels that in many cases you can even walk on. But the sun's power not turned into electricit

> solar panels don't like being hot. For boats there's flexible panels that in many cases you can even walk on. But the sun's power not turned into electricity, heats both panel & roof of the boat (and in turn, its interior). Not something you want on a hot sunny day. A rack-mounted panel otoh, allows for airflow underneath, and -if roof mounted- separates (potentially hot) panel from the boat's roof. So, cool(er) vs. aesthetics. Definitely a pitfall to be aware of for boat owners installing PV.