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Every year we must publish details of the fuel sources that have been used to generate the electricity we supply to our customers.

We update the below table to show how much (%) of the energy we’ve purchased and supplied to our customers has come from each of the major energy sources in the previous year (between April and March). We also include the carbon emissions associated with its generation, and show how our fuel mix compares to the UK average fuel mix.

Our customers’ electricity is sourced from our own UK power stations, the wholesale energy market and other independent power generators. We are a major supporter of independent renewable generators.

The information in the table below covers our supply licence for EDF Energy Customers Ltd for the period from April 2022 to March 2023. 

 CoalGasNuclearRenewableOtherCO2 g/kWhRadioactive waste g/kWh
EDF Energy's fuel mix1.6%16.7%59.4%21.0%1.3%870.0042
Contribution to our carbon emissions17.4%71.0%0.0%0.0%11.6%  
UK average fuel mix3.4%39.3%13.9%40.8%2.6%1860.0010

The figures for UK average fuel mix are provided by the Department for Energy Security & Net Zero (DESNZ). Depending on the tariff you are on, the fuel source and carbon emissions associated with the generation of your electricity may vary.  For more information on our fuel mix, visit

 CoalGas NuclearRenewableOtherCO2 g/kWhRadioactive waste g/kWh
Zero Carbon (1)0.0%0.0%100.0%0.0%0.0%00.0070
Renewable (2)0.0%0.0%0.0%100.0%0.0%00.0000
All other (3)2.9%30.4%57.9%6.5%2.3%1590.0041

1 Zero carbon: Zero carbon tariffs and products include any sold as ‘nuclear backed’, such as Zero Carbon for Business (formerly Blue for Business).
2 All renewable tariffs and products.
3 All other tariffs and products - tariffs not referred to as Zero Carbon or Renewable.

The zero carbon electricity that we buy for Residential, SME, Zero Carbon for Business (formerly Blue for Business) or Renewable tariffs and products is supplied into the National Grid. Customers receive that electricity through the National Grid, not directly from zero carbon generators.

CCS Framework membership benefits

Crown Commercial Service is delivering value for the nation through outstanding commercial capability and quality customer service. EDF Energy is one of the UK's largest energy companies and the largest producer of low-carbon electricity. Together, we're working to help public sector organisations simplify their energy purchasing, understand the market and save time and money. Find out more