EDF Renewables places repeat order with Wärtsilä for 100MWh UK battery storage project

By Lena Dias Martins
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Technology group Wärtsilä Energy has signed an additional contract with EDF Renewables UK for a 50MW/100MWh lithium-ion energy storage facility in Sundon, Bedfordshire in southern England.

The project – due to begin construction in spring 2023 – will increase intermittency management and renewable energy integration, as well as strengthening the resilience of the electric system, and balancing supply and demand by charging and discharging automatically.

The Sundon facility will also support electric vehicle (EV) charging and the electrification of public transport.

The contract includes Wärtsilä’s GridSoly Quantum system and GEMS Digital Energy Platform. The GEMS technology delivers data and insights for trading parties and performance for comprehensive asset management.

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EDF Renewables UK and Wärtsilä previously partnered on a 50MW transmission-connected battery storage system in the history university city of Oxford, which went live in June last year and the 50MW/50MWh battery storage system in Kemsley, Kent, which went live in October last year. 

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13 October 2026
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Now in its second edition, the Summit provides a dedicated platform for UK & Ireland’s BESS community to share practical insights on performance, degradation, safety, market design and optimisation strategies. As storage deployment accelerates towards 2030 targets, attendees gain the tools needed to enhance returns and operate resilient, efficient assets.

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