I seem to remember reading or seeing on TV something about solar paint, that can be painted on a building overtop a web of electrical wiring that uses suspended photoelectric particles in the paint to generate electricity. I should google it, but I think something revolutionary like that will be needed to really make solar as viable as possible. I know we looked into paneling where we live, with plenty of sun year 'round and good surfaces on the roof that face the sun more or less directly also year 'round, but the cost difference, even with subsidies, did not justify the expense of installation and maintenance. But I would love to get there some day. We are now looking into a hybrid system with vertical axis turbines combined with solar to take that step, since we also get fairly consistent wind year 'round.