It should be noted, though, that solar thermal plants can indeed generate electricity during the night, by collecting heat in reservoirs to later produce steam,

It should be noted, though, that solar thermal plants can indeed generate electricity during the night, by collecting heat in reservoirs to later produce steam, be them water or molten salt[1] heat reservoirs. [1] http://www.research-in-germany.de/61660/2011-03-08-molten-salts-for-efficient-solar-thermal-plants,sourcePageId=12358.html http://www.research-in-germany.de/61660/2011-03-08-molten-sa...