"Britain's renewable electricity generation hit a new record for the third quarter of 2025, with wind and solar output combining to deliver the country's cleanest power mix on record, according to the latest data from Montel Analytics. In the three months to the end of September, total renewable output - including wind, solar, hydro and biomass - reached 31.9 terawatt hours (TWh), the highest Q3 figure since records began in 2014. Renewables accounted for 51% of Britain's total power generation, overtaking all fossil-fuelled sources combined."
"Wind power led the charge with 17.7TWh, up 6% year on year and the highest third-quarter output ever recorded by Montel. The increase came despite several periods of curtailment, particularly in September when strong winds coincided with weak demand, driving electricity prices into negative territory for several hours. Solar generation also saw exceptional gains, producing 6.2TWh - the second-highest quarterly total since records began, behind only Q2 2025."
"Phil Hewitt, Director at Montel Analytics, said the figures reflect Britain's accelerating transition toward renewable energy and the growing impact of clean generation on the overall power mix. "High levels of renewable generation are symptomatic of a long-term commitment to producing more of our power from clean sources," Hewitt said. "Wind output would have been even higher had it not been for several curtailments across the quarter. Because of the high levels of renewable generation, the requirement for gas-fired power was significantly reduced.""
Britain's renewable electricity generation reached 31.9 terawatt hours in Q3 2025, the highest third-quarter total since records began in 2014. Renewables supplied 51% of total power generation, surpassing all fossil-fuelled sources combined. Wind produced 17.7TWh, up 6% year-on-year and the highest Q3 wind output on record, despite periods of curtailment that pushed prices negative during some hours. Solar generated 6.2TWh, a 32% increase from Q3 2024, boosted by prolonged sunshine and intense heatwaves that raised cooling demand. High levels of renewable generation reduced the requirement for gas-fired power. Combined cycle gas turbine plants produced 15.4TWh in Q3, slightly above the prior record low of 13.8TWh a year earlier.
Read at Business Matters
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