In recent years, solar power has become a much more significant part of the UK's electricity mix. In 2024, UK solar PV generated around 15–16 terawatt hours (TWh) of electricity, accounting for roughly 5% of total electricity generation. While that may still sound modest, it represents a dramatic increase compared to the early days of UK solar.
The UK's solar farms and rooftops generated more electricity than ever before in the first five months of 2025, as the country enjoyed its sunniest spring on record. The figures, revealed in new Carbon Brief analysis, show that the nation's solar sites have generated a record 7.6 terawatt hours (TWh) of electricity during January to May 2025.
Source: Carbon Brief analysis of figures from the National Electricity System Operator (NESO). The electricity generated by the UK's solar panels in the first five months of 2025 – at 7.5TWh – is enough to have offset the need for around 16TWh of imported gas.
Offshore wind generated 17.2% (48.9TWh) and onshore wind 12.3% (35.1TWh). Solar provided 5.2% (14.8TWh) and nuclear 14.25% (40.6TWh) of the UK's electricity in 2024. Low carbon sources (renewables and nuclear) generated a record 65% (185.2TWh), while fossil fuels fell to levels last seen in the 1950s at 31.5% (89.7TWh).
Renewables accounted for majority of annual UK electricity generation for the first time in 2024, with solar enjoying record highs despite fewer sun hours Gains for PV reflect increased
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The UK''s solar farms and rooftops generated more electricity than ever before in the first five months of 2025, as the country enjoyed its sunniest spring on record. The figures, revealed in
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Solar farms and rooftops in the UK generated a record 42% more electricity from January through May 2025 than during the same period in 2024.
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