| Sitting in the Nevada desert, the new Crescent Dunes Solar Energy Project is covered with more than 10,000 mirrors, each the size of a small house, that track the sun throughout the day and focus it on a receiver filled with molten salt. The salt, heated to almost 1,000 degrees Fahrenheit, stores the energy as heat, so it's always ready when it's needed. When the grid needs power, the heat in the salt is released to turn water into steam, which drives generators to make energy. That can happen whether the sun is shining or not. http://www.fastcoexist.com/3057288/this-huge-new-solar-farm-near-las-vegas-provides-power-even-at-night |
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