Average grid demand for this UK day.
On 21 September 2026, Britain’s electricity grid averaged 30.60 GW of grid demand, with renewables averaging 45.4% of tracked domestic generation and carbon intensity averaging 164 gCO₂/kWh. Daily UK electricity demand, generation, carbon intensity, imports, exports and key records.
Average grid demand for this UK day.
Highest 15-minute grid demand period.
Average carbon intensity where available.
Average renewable share of tracked generation.
Live Grid Data UK
On 21 September 2026, Britain’s electricity grid averaged 30.60 GW of grid demand, with renewables averaging 45.4% of tracked domestic generation and carbon intensity averaging 164 gCO₂/kWh. Daily UK electricity demand, generation, carbon intensity, imports, exports and key records.
Daily insight
On 21 September 2026, Britain’s electricity grid averaged 30.60 GW of grid demand, with renewables averaging 45.4% of tracked domestic generation and carbon intensity averaging 164 gCO₂/kWh.
The highest demand period was 36.34 GW at 13:00, while the lowest carbon intensity period was 107 gCO₂/kWh at 13:30.
Daily chart
Generation mix