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Daily UK grid report
UK Electricity Grid Daily Report — 12 September 2023

On 12 September 2023, Britain’s electricity grid averaged 31.41 GW of grid demand, with renewables averaging 23.2% of tracked domestic generation and carbon intensity averaging 238 gCO₂/kWh. Daily UK electricity demand, generation, carbon intensity, imports, exports and key records.

Avg demand 31.41 GW

Average grid demand for this UK day.

Peak demand 36.72 GW

Highest 15-minute grid demand period.

Avg carbon 238 gCO₂/kWh

Average carbon intensity where available.

Renewables 23.2 %

Average renewable share of tracked generation.

Average grid demandDemand
31.41 GWFull-day average from available snapshots
↑ +0.37 GW vs yesterday
Peak demand17:00
36.72 GWHighest 15-minute grid demand period
↑ +0.67 GW vs yesterday
Lowest demand03:30
24.34 GWLowest 15-minute grid demand period
↑ +1.11 GW vs yesterday
Domestic generationSupply
29.65 GWTracked UK generation sources only
↑ +0.56 GW vs yesterday
Average carbonCO₂
238 gCO₂/kWhCarbon intensity average
↑ +26 g vs yesterday
Renewable shareClean
23.2 %Wind, solar, hydro and biomass
↓ −5.3 pts vs yesterday
Clean share+ Nuclear
41.0 %Renewables plus nuclear
↓ −5.7 pts vs yesterday
Net importsFlow
-0.90 GWAverage imports minus exports
↓ −0.70 GW vs yesterday

Daily insight

What happened on the UK electricity grid?

On 12 September 2023, Britain’s electricity grid averaged 31.41 GW of grid demand, with renewables averaging 23.2% of tracked domestic generation and carbon intensity averaging 238 gCO₂/kWh.

The highest demand period was 36.72 GW at 17:00, while the lowest carbon intensity period was 169 gCO₂/kWh at 23:30.

Key records for 12 September 2023

Highest wind7.36 GW20:00
Highest solar4.04 GW13:00
Highest gas18.30 GW17:30
Lowest carbon169 gCO₂/kWh23:30
Highest imports3.80 GW10:00
Highest exports4.92 GW22:00

Daily chart

Demand, generation and carbon intensity

12 September 2023

Generation mix

Wind, solar, gas and interconnector flow