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Global battery storage capacity jumps 65.8% in 2025
Energy Institute data show installed battery capacity rose to 301.7 GW in 2025 from 182.0 GW in 2024, with growth tied to solar scaling and the need to shift power into peak hours.
Battery storage is emerging as a major energy trend, according to an analysis of the Energy Institute’s 2026 Statistical Review of World Energy. The review found global battery energy storage system capacity reached 301.7 gigawatts in 2025, up from 182.0 GW in 2024, a one-year increase of nearly 120 GW, or 65.8%. The article says the pace of growth is notable over the longer run as well, with global installed battery capacity at just 1.9 GW in 2015 and rising by about a factor of 158 over the decade. It links the buildout to solar expansion, noting that solar generation has become cheap enough for large scale deployment and that solar surpassed wind in global electricity generation for the first time in 2025. The piece adds that solar’s daytime output creates a balancing problem, which batteries can address by storing excess power and returning it to the grid later when demand is higher.