I quite liked the locale in FC5, but the (nearly?) unavoidable captures the game would force on you when you did too much open world stuff annoyed the hell out of me.
Then I had the ending spoiled for me and I just got too annoyed at the story planners and never touched it again.
There are different kinds of solar power generation, the photovoltaic panels that generate electricity directly that we all know and love, and thermal solar. You’ll commonly see a small-scaled version of this used on homes as a hot water system.
Scale it up though and you’ve got a system that can generate energy 24/7, as long as you’ve got enough thermal mass, and sunlight.