The great thing about solar is that it’s way bigger than the monstrously expensive PV arrays that the dimwits in DC focus on. The best solar investments are DIY projects:
You can build these for a few hundred to a couple thousand dollars, some of which will pay for themselves in a year or two.
And projects for every climate too. Like space heating a Montana barn in the dead of winter.
I don’t live in an arid or semi arid climate nor do I pay much attention to solar but its clear to me that if solar power keeps dropping in price for the next decade at the same rate it did in the last decade — then— instead of seeing solar farms dotting the landscape of the southwest from a jet as you fly to LA—most of the US southwest will covered with solar farms. Plus all the roofs of the houses will have photovoltaic arrays or some such.
When the numbers work everything else works
Might take 20 years but it will happen.