Wärtsilä and EDF Renewables Achieve Key Milestones in Energy Storage for a Net-Zero UK
June 16, 2025
Technology group Wärtsilä has strengthened its long-term partnership with EDF Renewables UK and Ireland to accelerate the UK’s journey toward clean power by 2030. The two companies have begun construction on two new projects, adding to an existing portfolio of six energy storage projects. In total, Wärtsilä will deliver eight sites for EDF Renewables, providing 404.5 MW / 709 MWh of energy storage capacity throughout the UK.
Recently, Wärtsilä completed the fifth and sixth grid-scale battery energy storage projects and signed additional long-term service agreements to ensure performance and reliability across all systems. Simone Sullivan, Head of Storage at EDF Renewables, stated, “Battery energy storage plays a crucial role in facilitating the UK’s clean energy transition. This essential technology optimizes the use of electricity generated from renewables, such as wind and solar, while enhancing grid reliability. Our collaboration with Wärtsilä allows us to maximize the efficiency of our grid-scale projects.”
By utilizing the power of data, the partnership aims to stabilize the grid, ensuring that batteries operate as efficiently and predictably as possible. “Optimizing the UK’s energy storage capacity helps minimize energy waste and guarantees the fastest, most effective transition to clean power,” Sullivan added.
As of now, six out of the eight facilities are operational. The recently completed projects include the 50 MW / 100 MWh Sundon project in Bedfordshire, which began commercial operations in December 2024, followed by the 57 MW / 114 MWh Bramford project in Suffolk, which commenced operations in April 2025. The two additional projects—Indian Queens in Cornwall and Bredbury in Greater Manchester—are currently under construction. Bredbury (50 MW / 100 MWh) is set to be completed by late 2025, while Indian Queens (47.5 MW / 95 MWh) is anticipated to go live in the first half of 2026.
As more facilities come online, ensuring optimal performance becomes increasingly critical for business success. All eight projects are supported by Wärtsilä’s long-term service agreements, which enhance operational efficiency and cost predictability for EDF Renewables. These agreements for the Sundon, Bramford, Indian Queens, and Bredbury projects guarantee performance levels, backed by a dedicated support team.
Chris Wolf, Sales Director for Europe at Wärtsilä Energy Storage, remarked, “Together with EDF Renewables, we are improving the reliability and flexibility of the UK’s energy system—making significant strides toward a 100% renewable energy future. Our long-term service agreements further underscore this commitment by ensuring performance, minimizing operational risks, and maximizing lifecycle value.”
In addition to Wärtsilä’s battery energy storage systems, all eight sites are managed through Wärtsilä’s GEMS software, which offers EDF Renewables data-driven insights for comprehensive asset management, performance optimization, and market trading. This system also enables EDF to enhance revenue opportunities through grid services such as electricity market trading and frequency response, while simultaneously strengthening grid stability.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/wartsila-and-edf-renewables-collaborate-to-enhance-energy-storage-for-a-net-zero-uk/
