Fidra Energy has reached financial close on its Thorpe Marsh battery energy storage project in South Yorkshire, backed by up to £445 million in equity from EIG and the UK’s National Wealth Fund, alongside £594 million in potential loan facilities from international lenders.
Designed with a capacity of 1.4 GW/3.1 GWh, Thorpe Marsh is set to become the UK’s largest battery storage facility when it begins operations in mid-2027. Once operational, it is expected to supply more than two million megawatt hours annually.
Fidra has secured contracts for equipment and construction, with Sungrow supplying its Power Titan 2.0 batteries, H&MV Engineering managing grid connections and electrical systems, and Jones Bros Civil Engineering UK leading civil and drainage works. Long-term offtake agreements with EDF, Octopus Energy, and Statkraft cover nearly 80% of the system’s capacity, while a 15-year capacity market award from 2028 provides additional backing.
The project underscores the growing role of large-scale storage in supporting renewable integration and strengthening energy security. Investors have highlighted Thorpe Marsh as a landmark for UK infrastructure, with the National Wealth Fund calling its participation a significant contribution to advancing the country’s clean energy ambitions.
