IEA: Battery storage accelerating27 Apr 2026 07:46
Around 80% of new battery capacity in 2025 was utility‑scale. The remainder was behind-the-meter capacity installed by commercial and residential consumers. Battery storage durations are gradually lengthening. While most projects still cluster around two hours, an increasing number can be deployed for four hours or more, reflecting the growing value of flexibility in systems with rising shares of PV.
China continued to lead battery deployment in 2025, accounting for around 60% of global additions, followed by the United States and Europe. However, deployment is widening beyond the largest markets, with strong momentum in Australia and parts of the Middle East, where storage is increasingly seen as a key building block for electricity security and renewables integration.
Battery-based uninterruptible power supplies (UPS) – primarily in data centres – also saw significant growth, with capacity additions rising 30% to 45 GW in 2025. However, unlike battery storage systems, UPS generally only provide short‑duration backup to bridge outages until other backup sources start
https://www.iea.org/reports/global-energy-review-2026/technology-battery-storage