Europe added 36 GWh of new battery energy storage capacity in 2025, a 48% increase on 2024, according to SolarPower Europe's European Battery Market Outlook 2026-2030. The figure confirms that the continent's storage build-out is accelerating even as other parts of the power sector, notably gas-fired generation, run into difficulty.
Cumulative capacity passes 100 GWh
The same outlook reports that cumulative operating energy capacity in Europe has now exceeded 100 GWh. That milestone has been reached remarkably quickly: the market has moved from a patchwork of small demonstration and co-located systems to a genuine asset class, with institutional investors, utilities and independent developers all competing for pipeline.
Perhaps the most significant structural signal in the data is the shift toward utility-scale. For the first time, utility-scale projects accounted for more than half of annual new installations in 2025. That change matters for the supply chain, for grid-connection queues and for market design, because large standalone batteries are typically merchant or capacity-market assets rather than the behind-the-meter systems that dominated early growth.
The economics have flipped
The growth is being driven by a straightforward cost story. Analysis by Wood Mackenzie finds that the levelized cost of energy for four-hour battery storage is now lower than that of open-cycle gas plants in all 43 markets examined. In other words, the competitive advantage of batteries is no longer a European niche argument — it is the default position across the markets studied.
Four-hour battery storage now undercuts open-cycle gas generation on levelized cost in every one of the 43 markets assessed by Wood Mackenzie — a threshold that changes the investment logic for flexibility across Europe.
That shift is visible in the project pipeline as well as in the installation statistics. In Belgium, Italy and Romania, developers have abandoned or shelved gas-fired projects and redirected capital toward batteries at the same grid connection points. In Germany, long-duration storage is being assessed as a cheaper security-of-supply instrument than new gas capacity.
What to watch in 2026-2030
SolarPower Europe's forecast window runs to 2030, and the key variables are no longer purely technological. Grid-connection timelines, the availability of long-term revenue contracts, the treatment of storage in capacity remuneration mechanisms, and the derating factors applied to batteries in capacity markets will determine whether the 48% growth rate of 2025 becomes a durable trend or a spike.
Italy's revised 2028 Capacity Market derating coefficients, which sharply reduce the recognised capacity of four-hour batteries in some regions, illustrate the risk: policy design can compress revenues even while the underlying cost case improves.
Source: RNAnews, citing SolarPower Europe's European Battery Market Outlook 2026-2030 and Wood Mackenzie analysis.
This article was assisted by AI analysis. Please refer to the original source for official information.