You are making very bold claims about solar being unreliable, but I'd completely expect reliability of solar to vary significant from one location to another.
Southeast USA. On the whole a good place for solar. I’m trying to impress on people the many fiddly little obstructions that add up to significant reductions, and that despite prolonged good periods there are poor exposure times that fast burn thru stored energy and require substantial collectors to recharge in time for the next weather event.