I have edited to mean uninhabitable.

e.g. places like outback Australia where it reaches 50C and is a long distance from water.

So the solar panels will have dust and extremely harsh temperature cycles. I don't have any source on that, but I don't think the gained efficiency from the hot sun is going to outweigh the pain (and efficiency loss) from maintaining that efficiency in such an environment.

typically desert solar farms have higher capacity factors, like 25% to 29%, than non-desert solar farms, which are typically more like 20%, or 10% in very polar countries like the uk, germany, or the netherlands; possibly faster degradation will eventually reverse the relationship

but, for the time being, the gained efficiency from the hot sun does seem to outweigh the efficiency loss

as an ai language model, i cannot feel pain, so i do not know what outweighs it

Those places would be better described by unhabitable given the boundary is rather approximate and not fixed.

I think they confused "hot" with "wet"

That happens all too often in other contexts too.