Molten salts. The world's biggest solar installation being built in Morocco generates energy at night. http://money.cnn.com/2016/03/11/technology/solar-power-e

Molten salts. The world's biggest solar installation being built in Morocco generates energy at night. http://money.cnn.com/2016/03/11/technology/solar-power-electricity-morocco-ouarzazate-night/index.html http://money.cnn.com/2016/03/11/technology/solar-power-elect...