Top 10 Carbon Intensity Records
Discover the cleanest periods in GB electricity history with the lowest carbon intensity. These records show when the electricity grid was at its greenest. Data is updated daily.
Top 10 carbon intensity records. Updated daily.
Last updated: 21 Aug 2026, 13:25
| Rank | Date & Time | Carbon Intensity (gCO₂eq/kWh) |
|---|---|---|
| #1 | 15 Apr 2024, 13:30 - 14:00 | 19.0 |
| #2 | 30 Apr 2026, 12:30 - 13:00 | 20.0 |
| #3 | 13 Apr 2024, 14:30 - 15:00 | 21.0 |
| #4 | 07 Apr 2026, 13:30 - 14:00 | 23.0 |
| #5 | 05 Apr 2024, 12:30 - 13:00 | 23.0 |
| #6 | 29 May 2025, 09:00 - 09:30 | 23.0 |
| #7 | 23 Aug 2024, 11:00 - 11:30 | 24.0 |
| #8 | 30 Mar 2025, 09:30 - 10:00 | 25.0 |
| #9 | 16 May 2025, 12:30 - 13:00 | 25.0 |
| #10 | 06 Apr 2024, 13:30 - 14:00 | 25.0 |