Why not Solar --> Electrolysis --> Burn to make steam energy? Solar heat and light are both available in abundance, especially in the tropics. That being so, why is that no attempts have been made to use Solar-Electricity to split water in large amounts, into H2 and O2 to boil water to produce steam to run power plants? By burning the H2 and using the O2 to increase the heat very large quantities of steam could be produced. So, why is this not being done on a large scale?