Rated power of energy storage projects in the U.S. 2021, by technology

In 2021, pumped hydro accounted for more than 90 percent of the rated power storage in the U.S., with more than 27 gigawatts. Electrochemical technologies followed by a large margin, with 874 megawatts. In contrast, that year, more than 400 gigawatts of standalone and hybrid battery storage projects were in interconnection queues in the U.S.在2021年，美国额定功率储能中，抽水蓄能占比超过90%，达到27吉瓦以上。紧随其后的是电化学技术，其装机容量为874兆瓦。与此形成鲜明对比的是，同年，美国有超过400吉瓦的独立和混合电池储能项目处于并网队列之中。