Especially for hot and sunny areas solar is insane.
At mid day, max heat, you get the peak production and can run your AC at full throttle.
That enables you to efficiently work at nice temperatures.
Buried in that longevity, is an observation that a fifth of panels degrade faster than expected
The long tail appears on graphs showing the degradation rate per year of the panels, indicating that up to 20% of all samples perform 1.5 times worse than the average.
and discussion: Maximising time in the sun: how to maintain and repair solar panels to make them last (2026) - https://www.theguardian.com/australia-news/2026/feb/13/maxim...
This is more about the lifetime of many PV panels in Australia (temps to 45 C so far) not specifically about PV panels with many hours at > 50 C.
So a 20 year old panel might be at around 80% in the worst case. Often they are in much better shape. This seems like a pretty good deal to me.