You're right, this is Tesla's dream...or at least a part of it. I think you will find it the dream of so many people, and if we can make it reality, the global effects will be incredible. No more bankster created conflicts over extracting oil and gas, the end of the Petrodollar, the evening-up of Africa as an economic player! Have you looked at Perovskite at all? When this becomes mainstream, it could seriously change everything in terms of solar energy harvesting.