Share of energy storage projects in the U.S. 2021, by technology
In 2021, electrochemical technologies - of which batteries are the most common type - accounted for roughly two-thirds of energy storage projects in the U.S. Pumped hydro storage, in contrast, represented less than ten percent of storage projects in the country. Nevertheless, it accounted by far for the largest energy storage capacity in the U.S. at the time.
