Other sources of thermal energy storage include heat or cold manufactured with heat pumps from off-peak, cheap electric electric power–a practice referred to as peak shaving; warmth from combined heat and ability plants; heat generated from renewable electrical energy exceeding grid demand from customers; and waste warmth from industrial procedures. https://techonpage.com/story6013825/how-icebat-cold-thermal-energy-storage-can-save-you-time-stress-and-money