Share of global annual capacity additions of battery storage by primary application, 2015-2025

Sources

IEA analysis based on data from BNEF (2026).

Notes

Energy shifting refers to the use of storage to move electricity across time, including the provision of reliable capacity to meet peak system needs. Ancillary services refers to the use of storage to provide grid support such as frequency regulation and operating reserves through rapid power injection or absorption. Congestion management refers to the use of storage at specific points in grids to relieve transmission or distribution constraints, improve utilisation of existing infrastructure, and defer grid reinforcement.