

So you ignored the fact that it’s not the earth that is getting heated, it’s the panels. So when the sun goes down the thin panels and the air around them cool down quickly, much more quickly than a large mass of hot rocks and dirt.
‘Thermal mass’ is a huge factor here. You ignored the basic finding that buildings with panels on the roof are cheaper to cool just because of the shading effect of the panels.
How is dirt different from a building in terms of thermal mass? It’s the same setup. Panels can shade buildings just as well as dirt. It’s actually a super complex situation that depends on a huge number of variables.
I’m pushing back because this common trope (solar panels cause heat islands) was part of a whirlwind of anti-solar FUD about a decade ago.
The moronosphere turned some wonky studies that showed some local heating effect (in some situations, not all) into a panic about it causing mega-storms and causing dogs and cats to want to live together.
Since then, actual experts have been working hard to understand the costs and benefits of large installations.
An example:
Agrivoltaics