https://www.pv-magazine.com/2026/07/11/study-finds-heatwaves-cause-hourly-losses-of-up-to-90-in-pv-plants-in-iberian-peninsula/

I've seen demos where people measure output, then let it heat up, then measure again, then spray it with water and measure again.

I haven't dared try it with my panels, but I wonder if in the hottest places they will need to add cooling, which will take away a lot of efficiency, obviously.