I’ve been curious about European battery storage buildout figures and forecasts for a while now - so I’ve dug in.
For the end of 2025, SolarPower Europe estimates operational battery storage for the EU-27 at 40 GW / 77.3 GWh (1.9 hours). Also for 2025, EMMES 10 reports approximately 49 GW / 81 GWh (1.7 hours) for EU-27 + GB + Norway + Switzerland. When I go to the JRC European Energy Storage Inventory page and select operational electrochemical and EU-27 + UK + Norway + Switzerland I get, as of today, 22 GW / 45 GWh (2 hours). Note that JRC has no Malta entries as of now.
That’s a pretty big gap between what SolarPower Europe and EMMES 10 report for the end of 2025 compared with what JRC lists as operational today (Sept 2026). This may reflect different coverage: SolarPower Europe and EMMES include distributed behind-the-meter systems, whereas JRC is a project inventory and probably does not comprehensively capture the distributed BTM fleet.
For the same countries, JRC lists as under construction 17.5 GW / 40 GWh (2.3 hours). I can’t tell from the website whether these projects have expected go-live dates, but they should represent the nearest-term part of the visible pipeline. Under its Medium Scenario, SolarPower Europe expects annual installations across its “Europe” region - EU-27 + UK + Switzerland + Ukraine + Turkey - to exceed 50 GWh in 2026 and reach 138 GWh in 2030.
JRC lists for EU-27 + UK + NO + CH 61 GW / 163 GWh (2.7 hours) as permitted and 76 GW / 221 GWh (2.9 hours) as announced.
For 2030 I’m seeing various estimates for EU-27 BESS buildout that represent different potential scenarios:
- SolarPower Europe’s Medium Scenario market forecast: 470 GWh
- SolarPower Base Case: 116 GW / 267 GWh (2.3 hours)
- SolarPower Europe Solar+ scenario: 171 GW / 598 GWh (3.5 hours)
- EU tripartite agreement mentions 200 GW (no energy figure) for all storage technologies - not BESS alone
For 2030, EMMES 10 predicts for EU-27 + GB + NO + CH an additional 153 GW / 485 GWh (3.2 hours) BESS on top of their approximate 49 GW / 81 GWh figure for 2025. This would imply 202 GW / 566 GWh (2.8 hours) by 2030 according to EMMES 10.
While some of these figures are hard to compare in terms of geography and what assets they cover, I think two aspects are interesting to point out:
- Across the cited EU-27 cases, BESS capacity rises from 77.3 GWh at end-2025 to at least 267 GWh by 2030. Even the lowest cited scenario therefore implies approximately 3.5-times growth; the Medium market forecast implies approximately six-times growth.
- The project pipeline and system scenarios point towards a more energy-heavy fleet: approximately two hours operational today, 2.3 hours under construction, 2.7 - 2.9 hours permitted or announced, and 2.3 - 3.5 hours in the EU’s 2030 system scenarios. This is consistent with energy shifting and wholesale arbitrage becoming more important alongside - not instead of - ancillary services.
It would actually be interesting to dig into these numbers further and look at their distribution across the EU: How is BESS storage duration distributed across Europe, and what does this tell us about the different markets?
Sources below.
SolarPower Europe — EU Battery Storage Market Review 2025: https://www.solarpowereurope.org/insights/outlooks/eu-battery-storage-market-review-2025-1/detail
SolarPower Europe — European Battery Market Outlook 2026–2030: https://www.solarpowereurope.org/insights/outlooks/european-battery-market-outlook-2026-2030-1/detail
SolarPower Europe/Rystad — Base Case and Solar+ scenarios: https://www.solarpowereurope.org/press-releases/new-report-solar-and-storage-would-slash-eu-power-system-operating-costs-in-half-by-2030
JRC — European Energy Storage Inventory: https://ses.jrc.ec.europa.eu/storage-inventory
EMMES 10 — European Market Monitor on Energy Storage: https://energystorageeurope.eu/publication/emmes-10-0-june-2026-2/
European Commission — Energy Storage Tripartite Agreement: https://energy.ec.europa.eu/strategy/affordable-energy/eu-level-tripartite-agreements_en