EDF and Ampeak Energy sign a long-term agreement to optimise flagship AW1 battery project
- EDF to optimise Ampeak Energy’s AW1 battery project at Uskmouth, Wales – a 120MW/240MWh facility following its successful financial close.
- Former coal-fired site to become one of Britain’s largest battery storage facilities, supporting energy security and lowering carbon emissions.
- Partnership brings EDF’s expertise to maximise performance at the Uskmouth site.
EDF, the UK’s largest optimiser of battery and flexible assets, has signed a long-term agreement with sustainable energy developer, owner and operator, Ampeak Energy, to optimise the AW1 Battery Energy Storage System (BESS) at Uskmouth in South Wales.
The 120MW/240MWh battery facility will store electricity and release it to the grid during periods of high demand, helping balance supply and demand while helping the UK lower its carbon emissions. The agreement marks an important step in Ampeak Energy’s plan to turn Uskmouth into a major sustainable energy park.
EDF will use its Powershift platform and expert trading team to maximise the commercial performance of AW1, helping guarantee that electricity is delivered exactly when it’s needed most.
For over half a century, Uskmouth was a coal-fired power station supplying electricity to the national grid. Now under Ampeak Energy’s ownership, it is being transformed into one of the UK’s largest battery storage facilities – supporting the move to net zero while strengthening the nation’s energy security.
With the AW1 project now at financial close and EDF on board, Ampeak Energy is laying the groundwork for Uskmouth to become a leading battery-powered energy site.
Stuart Fenner, Wholesale Market Services, Commercial Director at EDF said: “We’re proud to be working with Ampeak Energy on this landmark project. Battery storage is key to helping the UK reach its climate goal, and our partnership will unlock long-term value from one of the UK’s most exciting clean energy sites.”
David Taaffe, Chief Operating Officer at Ampeak Energy, added: “AW1 is our flagship battery project, and our partnership with EDF gives us the confidence to deliver lasting value and build momentum towards the creation of one of the largest Battery sites in the UK, which can be a catalyst for local and national regeneration.”
This deal strengthens EDF’s position as the UK’s largest operator of battery assets. Together, EDF and Ampeak Energy are helping speed up the shift to a smarter and more sustainable energy future for Britain.
About EDF
EDF is driving the transition towards An Electric Britain – a secure, affordable, low-carbon future for everyone. As Britain’s biggest generator of zero carbon electricity, we are investing more than £100 million weekly in Britain’s electricity infrastructure. We supply millions of customers with electricity and help homes and businesses switch to electricity for heating, transport and industrial processes.
We operate five nuclear power stations and more than 35 onshore wind farms and three offshore wind farms. Since 2009, EDF has invested almost £9 billion in the nuclear fleet to improve reliability and extend station lifetimes. The five generating stations currently supply about 12% of the UK’s electricity demand.
EDF is building the UK's nuclear renaissance with the construction of a new nuclear power station at Hinkley Point C. We are a minority investor (12.5%) in and major supplier to a replica plant at Sizewell C in Suffolk. Hinkley Point C and Sizewell C will provide low carbon electricity to meet 14% of UK demand and power around 12 million homes. EDF Group companies Framatome and Arabelle Solutions have a presence in the UK and manufacture critical equipment such as reactor pressure vessels and turbines.
EDF is enabling its 5 million customers, both in business and at home, to choose electric solutions that save cash and carbon, whether it is buying an electric car, generating and storing electricity, selling energy back to the grid or installing solar panels or a heat pump. In 2025, EDF’s Customers business was ranked as one of the Sunday Times’s Best Place to Work.
It is also one of the UK’s leading developers of renewable energy through EDF power solutions UK and Ireland. We have more than 2GW of renewable generation in operation and over 10GW in construction, planning and development across a range of technologies including onshore and offshore wind, solar and battery storage.
We are one of the largest suppliers to British business and a leading supplier of innovative energy solutions that are helping businesses become more energy independent. In addition, the company’s energy services business, Dalkia, is one of the UK and Ireland’s largest technical service providers.
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