IKNET is an engineering company specializing in advanced solutions for the energy sector. We understand the importance of integrating modern technologies, such as energy storage systems (ESS, BESS), for grid stability and efficiency, and we provide scalable services tailored to our clients’ needs.
Our ranking of the largest BESS systems in Europe clearly demonstrates the trends and potential of this market. It is designed to help Ukrainian companies and investors assess technological solutions and capacity scales, as well as highlight the potential of renewable energy sources. IKNET is happy to help domestic businesses realize such projects — we design and implement BESS projects in Ukraine.
Below is a ranking of the ten largest operational ESS (BESS) in Europe as of August 2025.
Top-10 BESS in Europe
1. RWE Neurath + Hamm BESS (Germany, 220 MW)
Located in North Rhine-Westphalia, this ESS with a capacity of 220 MW and 235 MWh was commissioned between December 2024 and February 2025. It consists of two facilities: Neurath (80 MW) and Hamm (140 MW), using 690 lithium-ion blocks.
2. Minety BESS (United Kingdom, 150 MW)
Located in Wiltshire, Minety BESS has a capacity of 150 MW and 266 MWh, consisting of three 50 MW facilities. It was launched in 2021–2022 and was long considered the largest in Europe.
3. SSE Ferrybridge BESS (United Kingdom, 150 MW)
Located in West Yorkshire, SSE Ferrybridge BESS (150 MW, 300 MWh) was completed in early 2025. It uses 136 Sungrow blocks and can supply power to over 240,000 homes.
4. Lovech BESS (Bulgaria, 124 MW)
Located in Lovech, this ESS with a capacity of 124 MW and 496 MWh was launched in May 2025. Officially recognized as the “largest BESS in the EU” by capacity, it consists of 111 battery containers.
5. FRV Midlands BESS (United Kingdom, 100 MW)
Located in the Midlands, this combined BESS with a capacity of 100 MW was commissioned in 2024. It consists of two separate projects developed by FRV (Abdul Latif Jameel Energy).
6. Clay Tye BESS (United Kingdom, 99 MW)
Located in Essex, Clay Tye BESS (99 MW, 198 MWh) was launched in March 2024. The ESS uses 52 Tesla Megapacks with AI Autobidder system and can power 300,000 homes for two hours.
7. Pillswood BESS (United Kingdom, 98 MW)
Located in Hull, Yorkshire, Pillswood BESS (98 MW, 196 MWh) was launched in November 2022. It uses 78 Tesla Megapack modules with 2-hour duration and is located next to the largest offshore wind farm Dogger Bank.
8. RWE Werne BESS (Germany, 72 MW)
Located in Werne, RWE Werne BESS (72 MW) was commissioned in 2023. Before the launch of Neurath and Hamm projects, it was considered the largest operational ESS in Germany.
9. Smareg4 BESS (Germany, 67 MW)
Located in Thuringia, Smareg4 BESS (67 MW) is part of Germany's energy transition strategy and supports the integration of renewables.
10. Contego BESS (United Kingdom, 34 MW)
Located in West Sussex, Contego BESS (34 MW, 68 MWh) was commissioned in 2023. The ESS uses 28 Tesla Megapacks and is one of the successful projects of the FRV and Harmony Energy partnership.
Note on other projects
- DTEK-Fluence BESS (Ukraine, 200 MW): commissioning stage, expected launch — October 2025. 6 sites, total capacity — 400 MWh.
- EnBW Philippsburg BESS (Germany, 400 MW): under development at the former NPP site; expected launch — 2026–2027.
- SSE Renewables (United Kingdom, up to 640 MWh): large-scale project under development.
- Carlton Power (United Kingdom, up to 2 GWh): ambitious megaproject that could reshape the market.
Regional Distribution
United Kingdom dominates: 6 of the top-10 projects, confirming its status as the leader of the European BESS market with operational capacity of around 7.5 GWh.
Germany takes second place: 3 projects in the top-10, with total installed BESS capacity of about 1.5 GWh.
Bulgaria unexpectedly entered the top-10 thanks to a breakthrough in BESS and the highest profitability potential in Europe.
The scale of these European BESS confirms that energy storage systems are an integral part of the modern power system and demonstrates how innovation is transforming the energy market.
The scale of European ESS confirms: energy storage systems are a key element of the modern power system. Innovation is changing the market and opening up new business opportunities.
Interested in implementing advanced BESS solutions or other energy initiatives in Ukraine? IKNET offers a full range of services — from technical audits and design to implementation and commissioning.