EDF and BW ESS formed a partnership to optimize the Hams Hall battery energy storage system (BESS) in North Warwickshire, UK, through EDF’s PowerShift platform under a 10-year floor agreement. The first phase of the project delivers 350 MW / 1,243 MWh of capacity, with a second phase adding 50 MW to reach a total of 400 MW / 1,424 MWh, making it the longest duration battery EDF has contracted to date. Located near Birmingham and connected to the Hams Hall 400 kV National Grid substation, the project is expected to begin commercial operations in Q4 2026 and support the electricity needs of around 1.3 million homes for up to 3.5 hours once operational. BW ESS, which co-owns the project with AIP Management as part of its UK portfolio, highlighted the collaboration’s role in maximizing the commercial potential of the strategically important asset. EDF emphasized that the partnership will unlock flexibility to support more renewable power and advance its goal of electrifying Britain.