2018 saw the greatest capacity additions to energy storage systems globally. South Korea alone deployed a combined utility-scale and behind-the-meter storage of 0.6 gigawatts in 2019, making up the greatest share among the leading four countries, followed by China and Germany at 0.5 gigawatts. Statista Accounts: Access All Statistics.
Installed capacity of energy storage is continuing to increase globally at an exponential rate. Global capacity doubled between 2017 and 2018 to 8 GWh (IEA, 2018). Pumped hydro storage still makes up for the bulk of energy storage capacity accounting for 96.2% of the worldwide storage capacity.
NextEra Energy NEE: This utility provider has more energy storage capacity than any other company in the United States, with more than 150 MW of battery energy storage systems in operation.
Zakeri and Syri also report that the most cost-efficient energy storage systems are pumped hydro and compressed air energy systems for bulk energy storage, and flywheels for power quality and frequency regulation applications.
Industry-specific and extensively researched technical data (partially from exclusive partnerships). A paid subscription is required for full access. The United States was the leading country for battery-based energy storage projects in 2022, with approximately eight gigawatts of installed capacity as of that year.
Mechanical energy storage has the highest share across all the energy storage technologies. It is comprised of systems such as, pumped hydro storage (PHS), flywheels (FES) and compressed air energy storage (CAES). These systems are widely used and are advantageous on large scale in various commercial, industrial, and residential uses (Table 3).