You will agree then that a 10kW residential solar installation on a roof is "experimental" and "not in full-scale production". What about the 1 million residen

You will agree then that a 10kW residential solar installation on a roof is "experimental" and "not in full-scale production". What about the 1 million residential solar installations done in 2016? Is that "experimental"? When you add 20 100MW plants, you reach the scale of a nuclear plant. That is precisely the beauty of solar. That it can grow incrementally without high capital costs (unlike borrowing $4bn and a huge insurance at once with nuclear).