The other failure factor in that environment is the heat. Being that the cells are soldered together, I know from experience that the heat out there will start to create cold solder joints from the solder going to a semi fluid state, especially the low lead solders required for manufacturing today. I have a factory installed digital display in my truck in a little overhead center console hat I take out once a year to re-solder the surface mount solder joints so I can see the readout. It seems to fade every year during the Florida summers.
This could very well be an even bigger maintenance headache than the windmills.
The public has the mis conception that solar cells do better in a hot environment. Nothing could be further from the truth, yet our gov’t is full scale ahead on putting these “monuments to ignorance” in every desert environment they can steal.