The United Kingdom has already achieved significant progress in the battery energy storage sector in 2025, with 7.86 GW / 11.8 GWh of large-scale storage already in operation. Nearly 2 GW / 3.5 GWh were added in just the first ten months of 2025, representing a 36% year-on-year increase. In line with this positive trend, the Thorpe Marsh project will become the largest battery installation in the UK and one of the most ambitious stand-alone battery systems in the world.
As technology provider, Sungrow will supply units of its PowerTitan 2.0 BESS, delivering 1.6 GW / 3.3 GWh of energy storage capacity—enough to power more than 785,000 homes per year and capable of exporting over 2,000 GWh annually. By adding a volume equivalent to more than 20% of the UK’s current battery fleet, the project represents a pivotal moment in the country’s path toward energy resilience.
“This is a historic moment for the UK’s energy transition and for the global energy storage industry,” said James Li, Director of ESS Europe at Sungrow. “We are proud to support Fidra Energy and all partners in delivering a project that will set new standards in scale and performance. Thorpe Marsh demonstrates how cutting-edge battery technology can accelerate the shift toward a cleaner and more resilient energy system. Our team’s commitment to providing the highest level of support to our partners is the cornerstone of our strategy to pave the way toward a sustainable future.”
The PowerTitan 2.0 is a fully liquid-cooled, modular solution designed for large-scale applications. Engineered to maximize efficiency and reliability while simplifying installation, it offers the flexibility needed to deliver consistent performance at an unprecedented scale, as demonstrated by the Thorpe Marsh project.
“Sungrow has proven to be an excellent partner, and we look forward to working with them to support our growth ambitions in the UK and Europe,” said Chris Elder, CEO of Fidra Energy.
The project secured an investment of approximately GBP 750 million and received backing from EIG, the UK National Wealth Fund, and an international group of lenders including NatWest, Santander CIB, Deutsche Bank AG, Société Générale, and Standard Chartered Bank, among others. Construction is already underway, and commissioning is scheduled for mid-2027.
Thorpe Marsh also has long-term power purchase agreements (PPAs) with EDF, Octopus Energy, and Statkraft, covering around 80% of its capacity. Additionally, it secured a 15-year UK Capacity Market contract starting in 2028. Together, these agreements provide a stable revenue foundation for one of the most ambitious energy storage facilities ever financed.
Beyond Thorpe Marsh, Sungrow will also supply its advanced solutions to the West Burton C ESS project, a 500 MW / 1.1 GWh installation. This project is also supported by EIG and the UK National Wealth Fund and will be developed by Fidra Energy.
As the UK rapidly advances toward its 2035 clean-energy goal, large-scale battery projects like Thorpe Marsh are essential to integrating renewable generation, smoothing intermittency, and supporting grid stability. From the UK to Belgium, Ireland, the Netherlands, and Finland, Sungrow remains committed to deploying next-generation energy storage solutions that enable the clean-energy transition across Europe and beyond.
