April 2026
94
Avg Carbon g
20
Cleanest g
201
Dirtiest g
Renewables averaged 51.6% of generation in April 2026, with carbon intensity ranging from 20g to 201g CO2/kWh and averaging 94g CO2/kWh.
About these monthly reports
These reports summarize Great Britain electricity data by calendar month.
Each report includes average carbon intensity, average renewable share, and monthly fuel mix percentages.
Data sources: Carbon Intensity API (NESO and University of Oxford), Elexon BMRS, Sheffield Solar PVLive, and NESO embedded generation datasets.
Reports are generated automatically at the start of each month and can be refreshed if upstream datasets are revised.
Methodology is published on the methodology page.
March 2026
117
Avg Carbon g
26
Cleanest g
246
Dirtiest g
Renewables averaged 50.3% of generation in March 2026, with carbon intensity ranging from 26g to 246g CO2/kWh and averaging 117g CO2/kWh.
February 2026
137
Avg Carbon g
39
Cleanest g
250
Dirtiest g
Renewables averaged 48.8% of generation in February 2026, with carbon intensity ranging from 39g to 250g CO2/kWh and averaging 137g CO2/kWh.
January 2026
145
Avg Carbon g
42
Cleanest g
286
Dirtiest g
Renewables averaged 48.5% of generation in January 2026, with carbon intensity ranging from 42g to 286g CO2/kWh and averaging 145g CO2/kWh.
December 2025
120
Avg Carbon g
38
Cleanest g
241
Dirtiest g
Renewables averaged 50.5% of generation in December 2025, with carbon intensity ranging from 38g to 241g CO2/kWh and averaging 120g CO2/kWh.
November 2025
126
Avg Carbon g
33
Cleanest g
260
Dirtiest g
Renewables averaged 51.7% of generation in November 2025, with carbon intensity ranging from 33g to 260g CO2/kWh and averaging 126g CO2/kWh.
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