SSE has reached a key milestone in its South Milford battery storage project, with battery units now delivered to the Monk Fryston site near Tadcaster. Once completed in early 2026, the 320MW/640MWh battery energy storage system (BESS) will be SSE’s largest to date and one of the UK’s biggest operational storage sites.
The project is more than six times the size of SSE Renewables’ 50MW/100MWh battery in Salisbury and more than double the capacity of its 150MW/300MWh sites under construction at Ferrybridge and Fiddler’s Ferry. When fully operational, Monk Fryston will power up to 533,000 homes for two hours during peak demand.
Morrison Energy Services, part of M Group Services’ Energy Division, is overseeing the installation, which includes Sungrow’s battery units. Sungrow is also working with SSE Renewables on the Ferrybridge storage project.
SSE and its partners see the Monk Fryston BESS as a critical step in improving grid flexibility and supporting the UK’s renewable energy transition.
