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Daily UK grid report
UK Electricity Grid Daily Report — 23 September 2023

On 23 September 2023, Britain’s electricity grid averaged 26.83 GW of grid demand, with renewables averaging 43.1% of tracked domestic generation and carbon intensity averaging 132 gCO₂/kWh. Daily UK electricity demand, generation, carbon intensity, imports, exports and key records.

Avg demand 26.83 GW

Average grid demand for this UK day.

Peak demand 31.69 GW

Highest 15-minute grid demand period.

Avg carbon 132 gCO₂/kWh

Average carbon intensity where available.

Renewables 43.1 %

Average renewable share of tracked generation.

Average grid demandDemand
26.83 GWFull-day average from available snapshots
↓ −2.03 GW vs yesterday
Peak demand20:00
31.69 GWHighest 15-minute grid demand period
↓ −2.55 GW vs yesterday
Lowest demand04:15
21.15 GWLowest 15-minute grid demand period
↑ +0.47 GW vs yesterday
Domestic generationSupply
22.58 GWTracked UK generation sources only
↓ −1.57 GW vs yesterday
Average carbonCO₂
132 gCO₂/kWhCarbon intensity average
↑ +2 g vs yesterday
Renewable shareClean
43.1 %Wind, solar, hydro and biomass
↑ +1.2 pts vs yesterday
Clean share+ Nuclear
66.3 %Renewables plus nuclear
↑ +1.9 pts vs yesterday
Net importsFlow
3.23 GWAverage imports minus exports
↓ −0.96 GW vs yesterday

Daily insight

What happened on the UK electricity grid?

On 23 September 2023, Britain’s electricity grid averaged 26.83 GW of grid demand, with renewables averaging 43.1% of tracked domestic generation and carbon intensity averaging 132 gCO₂/kWh.

The highest demand period was 31.69 GW at 20:00, while the lowest carbon intensity period was 72 gCO₂/kWh at 23:30.

Key records for 23 September 2023

Highest wind13.05 GW23:00
Highest solar7.12 GW11:30
Highest gas10.42 GW19:00
Lowest carbon72 gCO₂/kWh23:30
Highest imports6.71 GW15:00
Highest exports2.73 GW22:00

Daily chart

Demand, generation and carbon intensity

23 September 2023

Generation mix

Wind, solar, gas and interconnector flow