The 2nd know-how is concentrating solar electric power, or CSP. It is actually employed principally in quite massive power plants and isn't appropriate for household use. In 2015, a situation-study conducted in 7 nations around the world concluded that in all situations generating expenditures is usually diminished by hybridising mini-grids https://www.wellconnectedlife.co.uk/the-rise-of-commercial-solar-pv-a-sustainable-future-for-businesses/