UK T-4 capacity auction for delivery in 2028/29 finished: RWE secured 6,444MW capacity agreements

Essen, 11 March 2025

  • The auction cleared at £60.00/kW/year
  • All but one of RWE assets successfully secured an agreement

The T-4 Capacity Market auction has completed for delivery 2028/29. The EMR Delivery Body (National Grid ESO) has announced that the capacity auction has cleared at £60.00/kW/year, 43,055MW of capacity has been secured for the UK. 

A provisional list of the UK assets that have successfully secured an agreement can be viewed here. This information is still subject to Secretary of State approval.

RWE has secured Agreements for all but one of the Capacity Market Units (CMUs) that were entered into the auction. This means RWE has 6,444MW (derated) of capacity agreements for the 2028/29 delivery year. 

For the first time, RWE has been successful in securing agreements for all technologies it operates including 9 CM agreements for its hydro sites and a CM agreement for its new Pembroke Battery and new Cheshire Recips projects. In addition, for the first time RWE has secured agreements for Scroby Sands offshore wind farm and Stags Holt onshore wind farm, ensuring renewable capacity can participate in security of supply. 

The UK Capacity Market remains an important part of the UK energy market design and has provided stability for RWE’s generation business over the past decade. As older renewable sites become eligible to enter the CM auction, this will also provide an important part of their income. 

As one of the largest generators in the UK, RWE is committed to investing and expanding its green generation capacity, to support the UK’s energy transition on its journey to net zero and help to support lower energy prices in the longer term.  

RWE is the UK’s largest operator of Combined Cycle Gas Turbine (CCGT) power plants with a fleet of around 7GW installed capacity providing security for the country’s energy supply. The company is driving an accelerated pace of transition as it develops carbon capture and storage projects at four sites alongside developing hydrogen combustion options to decarbonise its sites. The company target is for the first of its fleet to be converted to decarbonised operation before 2030.