Fuel Mix and Carbon Intensity, Last 24 Hours
Last 24 hours (4:55am 7 May 2021 to 4:55am 8 May 2021)
Output by Fuel Type
The fuel mix of GB electricity supply for the last 24 hours (excludes embedded generation). For recent fuel mix including embedded generation, see the Fuel Mix Archive.
Source data updates every 5 minutes, this page will auto refresh.
Carbon Intensity
Calculation by electricity info of the carbon intensity of GB electricity supply for the last 24 hours (excludes embedded generation).
LOW: 199 ; AVERAGE: 293 ; HIGH: 321 CO2 g/kWh*
Source data updates every 5 minutes, this page will auto refresh.
Notes
Balancing Mechanism Reporting Service (BMRS) data is reproduced with the permission of the rights holder, ELEXON Limited. The BMRS data is indicative only and may only be used with the permission of ELEXON Limited. Details on how to obtain permission to use BMRS data are available at http://www.bmreports.com/.
CO2 intensity figures are electricity info calculations using Elexon output figures. See the full methodology.
* There are limitations and simplifications in providing real time values, and these figures also exclude all embedded generation.
Oil output is included in "other" in pie charts and graphs but is treated separately for carbon intensity calculations.
The Last 24 hours average is a weighted average, so the carbon intensity at periods of high demand affect the average more than the carbon intensity during low demand.
The red and green zones in the Carbon Intensity chart represent the upper and lower quartiles for the five-minute intensity data over the 24 hours.
A warning on white goods
If you intend using carbon intensity data to decide when to run white goods like washing machines and tumble dryers, please take note of Fire Service advice not to run such equipment at night or while unattended.
Embedded generation
The data above excludes embedded generation — electricity generating plant that is connected to a distribution network rather than the transmission network — which includes most solar output and a significant amount of total wind output.