Renewable energy supplied 52.1 percent of the United Kingdom’s electricity generation in 2025, marking the second consecutive year that clean power sources accounted for more than half of the country’s electricity mix.
New figures from the UK Department for Energy Security and Net Zero (DESNZ) show renewables generated a record 153 terawatt-hours (TWh) of electricity in 2025, up from 144.5 TWh in 2024.
The increase was largely driven by continued expansion in wind and solar capacity, with wind power remaining the largest renewable electricity source.
Wind accounted for 29.5 percent of total UK electricity generation in 2025, slightly higher than the 29.2 percent recorded in 2024. However, gas remained the country’s single largest generation source, contributing 31.8 percent of electricity production.
Solar power also reached a new milestone, generating 20.1 TWh of electricity and accounting for 6.9 percent of total generation, compared with 15 TWh and 5.2 percent in 2024.
The growth in renewable generation came as nuclear power output declined by 12 percent, falling from 40.6 TWh in 2024 to 35.9 TWh in 2025. The decline was attributed to the retirement of older nuclear facilities and increased outages across the ageing nuclear fleet.
Overall, UK energy production fell by one percent compared with 2024, with gas output dropping by three percent to its lowest level this century as production from mature North Sea fields continued to decline.
The latest figures highlight the continued shift in the UK’s electricity system towards renewable energy, with wind and solar playing an increasingly central role in the country’s transition to a lower-carbon power sector.