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Daily UK grid report
UK Electricity Grid Daily Report — 27 September 2023

On 27 September 2023, Britain’s electricity grid averaged 31.29 GW of grid demand, with renewables averaging 47.6% of tracked domestic generation and carbon intensity averaging 142 gCO₂/kWh. Daily UK electricity demand, generation, carbon intensity, imports, exports and key records.

Avg demand 31.29 GW

Average grid demand for this UK day.

Peak demand 38.89 GW

Highest 15-minute grid demand period.

Avg carbon 142 gCO₂/kWh

Average carbon intensity where available.

Renewables 47.6 %

Average renewable share of tracked generation.

Average grid demandDemand
31.29 GWFull-day average from available snapshots
↓ −0.84 GW vs yesterday
Peak demand19:00
38.89 GWHighest 15-minute grid demand period
↑ +0.67 GW vs yesterday
Lowest demand04:00
22.19 GWLowest 15-minute grid demand period
↓ −2.30 GW vs yesterday
Domestic generationSupply
28.67 GWTracked UK generation sources only
↓ −1.65 GW vs yesterday
Average carbonCO₂
142 gCO₂/kWhCarbon intensity average
No change vs yesterday
Renewable shareClean
47.6 %Wind, solar, hydro and biomass
↓ −3.3 pts vs yesterday
Clean share+ Nuclear
65.9 %Renewables plus nuclear
↓ −2.3 pts vs yesterday
Net importsFlow
0.88 GWAverage imports minus exports
↑ +1.74 GW vs yesterday

Daily insight

What happened on the UK electricity grid?

On 27 September 2023, Britain’s electricity grid averaged 31.29 GW of grid demand, with renewables averaging 47.6% of tracked domestic generation and carbon intensity averaging 142 gCO₂/kWh.

The highest demand period was 38.89 GW at 19:00, while the lowest carbon intensity period was 56 gCO₂/kWh at 23:30.

Key records for 27 September 2023

Highest wind19.13 GW18:30
Highest solar3.06 GW11:00
Highest gas11.53 GW09:00
Lowest carbon56 gCO₂/kWh23:30
Highest imports5.64 GW11:45
Highest exports4.32 GW23:45

Daily chart

Demand, generation and carbon intensity

27 September 2023

Generation mix

Wind, solar, gas and interconnector flow