OverviewCategoriesThermal BatteryElectric thermal storageSolar energy storagePumped-heat electricity storageSee alsoExternal linksThermal energy storage (TES) is the storage of thermal energy for later reuse. Employing widely different technologies, it allows surplus thermal energy to be stored for hours, days, or months. Scale both of storage and use vary from small to large – from individual processes to district, town, or region. Usage examples are the balancing of energy demand between daytime and nighttim