The largest operational battery energy storage system (BESS) in Great Britain is now online and delivering clean power to the electricity grid, marking a major milestone in the country’s energy transition. The project, known as Thurrock Storage, was developed by Statera Energy and is supported by Statkraft, a leading provider of market access and optimisation services.

Located in Tilbury, Essex, the 300 MW/600 MWh Thurrock facility can supply electricity to around 680,000 homes for up to two hours, reinforcing the role of large-scale storage in balancing renewable generation and grid stability.

Statkraft signed a long-term power purchase agreement (PPA) with Statera Energy in 2023 to provide market-leading optimisation and an innovative revenue floor structure, helping secure financing for the project. The partnership combines Statera’s expertise in energy storage with Statkraft’s advanced trading and optimisation capabilities.

Statkraft’s London-based origination team is the leading long-term trader in energy transition assets in the UK, with more than 4 GW of renewable PPAs and 3.5 GW of flexible assets—including batteries and flexible generation—under contract. The company’s proprietary technologies enable tailored optimisation based on each asset’s characteristics and the owner’s risk profile, ensuring transparency and maximised revenues across multiple markets.

According to Brian Lonn, Statkraft’s Head of UK Flexibility, “Statera Energy has delivered a nationally significant project that plays a vital role in advancing Great Britain’s energy transition. I particularly want to recognise the Statera teams for their dedication and professionalism in turning this ambitious vision into reality. We look forward to continuing our partnership to optimise their assets in the years ahead.”

Lewis Elder, Director of Commercial Operations & Policy at Statera, added: “We are delighted that Thurrock Storage has now entered commercial operations. Thanks to our close collaboration with Statkraft, the site is fully onboarded and active in the market. Statkraft’s team has been highly reliable and supportive throughout commissioning, and we look forward to continuing our work together to optimise the asset and maximise its value going forward.”

The launch of the Thurrock Storage project marks a significant step forward in Great Britain’s journey toward a more resilient and low-carbon electricity system, underscoring the growing importance of large-scale energy storage in achieving national net-zero goals.