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Energy generation in Wales

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Results of a study into energy generating projects up to the end of 2017.

The study provides information on the sources of energy generation in Wales including the number of generators and installed capacity to the end of 2017. The study includes both electricity and heat projects and estimates how much energy would have been generated by them.

The study builds on previous Energy Generation in Wales reports, produced from 2014 onwards, and looks at the growth of renewable energy in 2017, reviewing the growth prospects of each technology.

  • Wales generated 32.5 TWh of electricity in 2017, of which 7.1 TWh was from renewables and 25.5 TWh from fossil fuels.
  • Six combined cycle gas turbines (CCGT) plants and one coal power station provide 92% of fossil fuel generation.
  • Welsh renewables generated electricity equivalent to 48% of Wales’ consumption. This generation is spread out across Wales, showing a major shift to a more distributed model of energy generation.
  • The ownership section of the report sets out more information on who owns projects in Wales, where the data is available.
  • The number of projects owned by people and organisations based in Wales, where ownership details are available, is more than 63,000.
  • The total installed capacity of locally owned electricity projects is almost 530 MW.
  • Storage capacity is dominated by two large pumped hydro storage projects in North Wales.


We will carry out this study again in future years to track progress.

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Low carbon energy survey 2014 (File size: 1.31MB)