State of the grid
A report on Britain's electricity each month, built from public data. Every sentence is filled in by code.
Latest: September 2026
- Average carbon intensity
- 108 g/kWh
- 112 g/kWh a year earlier
- Zero-carbon share
- 60%
- 56% a year earlier, without hydro (no data)
- Balancing costs
- £505m
- £479m on constraints
- Agile, London
- 26.2p
- 131 half hours below zero
Great Britain's electricity averaged 108 grams of CO₂ per kWh in September 2026, 4% lower than in September 2025 (112 g/kWh).
Read the September 2026 reportEvery month
Each report, newest first.
| Month | Average g/kWh | Zero-carbon |
|---|---|---|
| September 2026 | 108 | 60% |
| August 2026 | 125 | 51% |