Innovative ‘Sand Battery’ is Heating Small City, Storing Green Energy for Months at a Time

A town in Finland is using sand to store heat from renewable energies to provide home heating during winter. Water heating can only store 100°C of heat, obviously, while sand can reach 500°C, or nearly 1000° Fahrenheit. Tens of thousands of cubic meters of sand are heated from the generation of electricity with solar panels […]

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