They definitely work.

But as an example I installed a 60KVA system on a mine site. Designed by some top engineers. The back-up generator was constantly running due to the panels under performing. The reason being the high temperatures up there.

The number of panels were doubled to cope with the losses.

Another problem solved by the biggest pollution producer in the world.

I hope the engineers on that project fully understand the losses in extreme heat or it will become a $70 billion job.