> There's an option of overbuilding PV to fully accommodate cloudy days or the winter season If that is the future -- I hope it is :D Then there will be hours

> There's an option of overbuilding PV to fully accommodate cloudy days or the winter season If that is the future -- I hope it is :D Then there will be hours of the day where electricity is practically free, if not actually free. So any mechanism for time shifting energy consumption might generate a nice buck. I guess the competition is PV or wind + long distance transmission loss.