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Daily UK grid report
UK Electricity Grid Daily Report — 17 September 2023

On 17 September 2023, Britain’s electricity grid averaged 26.88 GW of grid demand, with renewables averaging 43.2% of tracked domestic generation and carbon intensity averaging 123 gCO₂/kWh. Daily UK electricity demand, generation, carbon intensity, imports, exports and key records.

Avg demand 26.88 GW

Average grid demand for this UK day.

Peak demand 32.72 GW

Highest 15-minute grid demand period.

Avg carbon 123 gCO₂/kWh

Average carbon intensity where available.

Renewables 43.2 %

Average renewable share of tracked generation.

Average grid demandDemand
26.88 GWFull-day average from available snapshots
↓ −0.06 GW vs yesterday
Peak demand17:00
32.72 GWHighest 15-minute grid demand period
↑ +0.59 GW vs yesterday
Lowest demand04:15
20.90 GWLowest 15-minute grid demand period
↓ −0.05 GW vs yesterday
Domestic generationSupply
22.44 GWTracked UK generation sources only
↑ +0.13 GW vs yesterday
Average carbonCO₂
123 gCO₂/kWhCarbon intensity average
↓ −15 g vs yesterday
Renewable shareClean
43.2 %Wind, solar, hydro and biomass
↑ +4.9 pts vs yesterday
Clean share+ Nuclear
66.8 %Renewables plus nuclear
↑ +4.7 pts vs yesterday
Net importsFlow
3.03 GWAverage imports minus exports
↓ −0.31 GW vs yesterday

Daily insight

What happened on the UK electricity grid?

On 17 September 2023, Britain’s electricity grid averaged 26.88 GW of grid demand, with renewables averaging 43.2% of tracked domestic generation and carbon intensity averaging 123 gCO₂/kWh.

The highest demand period was 32.72 GW at 17:00, while the lowest carbon intensity period was 86 gCO₂/kWh at 23:30.

Key records for 17 September 2023

Highest wind8.73 GW23:30
Highest solar2.68 GW10:30
Highest gas10.40 GW19:30
Lowest carbon86 gCO₂/kWh23:30
Highest imports6.38 GW13:15
Highest exports2.67 GW06:00

Daily chart

Demand, generation and carbon intensity

17 September 2023

Generation mix

Wind, solar, gas and interconnector flow