Average grid demand for this UK day.
On 20 September 2025, Britain’s electricity grid averaged 28.43 GW of grid demand, with renewables averaging 57.0% of tracked domestic generation and carbon intensity averaging 120 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 20 September 2025, Britain’s electricity grid averaged 28.43 GW of grid demand, with renewables averaging 57.0% of tracked domestic generation and carbon intensity averaging 120 gCO₂/kWh. Daily UK electricity demand, generation, carbon intensity, imports, exports and key records.
Daily insight
On 20 September 2025, Britain’s electricity grid averaged 28.43 GW of grid demand, with renewables averaging 57.0% of tracked domestic generation and carbon intensity averaging 120 gCO₂/kWh.
The highest demand period was 32.97 GW at 19:45, while the lowest carbon intensity period was 74 gCO₂/kWh at 22:00.
Daily chart
Generation mix