September 2, 2025
Global Renewable News

EDF ENERGY
EDF and Ampeak Energy sign a long-term agreement to optimise flagship AW1 battery project

September 2, 2025

Highlights

  • 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 helping Britain achieve Net Zero by leading the transition to a cleaner, low emission, electric future and tackling climate change. It is the UK's largest producer of zero carbon electricity and supplies millions of customers with electricity and gas.

It generates low carbon electricity from five nuclear power stations and more than thirty onshore wind farms and two offshore wind farms. Since 2009, EDF has invested almost £8 billion in the nuclear fleet to improve reliability and extend station lifetimes. The five generating stations currently supply about 14% of the UK's electricity demand.

EDF is leading the UK's nuclear renaissance with the construction of a new nuclear power station at Hinkley Point C. We also continue to support a replica plant at Sizewell C in Suffolk, which is now majority owned by the UK government. Hinkley Point C and Sizewell C will provide low carbon electricity to meet 14% of UK demand and power around 12 million homes.

EDF is one of the UK's largest investors in renewables, with more than 1.5GW of renewable generation in operation and over 14GW in construction, planning and development across a range of technologies including onshore and offshore wind, solar and battery storage. We are constructing our largest offshore wind farm in Britain - the 450 MW Neart na Gaoithe project in Scotland.

EDF is helping its customers, both in business and at home, take their first steps to sustainably powering their lives, 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. EDF is 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 largest technical service providers in the UK and Ireland.

EDF is part of EDF Group, the world's biggest electricity generator. In the UK, the company employs around 14,000 people at locations across England, Scotland, Wales and Ireland.

For more information

EDF Energy

www.edfenergy.com/


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