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Daily UK grid report
UK Electricity Grid Daily Report — 28 September 2023

On 28 September 2023, Britain’s electricity grid averaged 31.15 GW of grid demand, with renewables averaging 59.0% of tracked domestic generation and carbon intensity averaging 101 gCO₂/kWh. Daily UK electricity demand, generation, carbon intensity, imports, exports and key records.

Avg demand 31.15 GW

Average grid demand for this UK day.

Peak demand 37.52 GW

Highest 15-minute grid demand period.

Avg carbon 101 gCO₂/kWh

Average carbon intensity where available.

Renewables 59.0 %

Average renewable share of tracked generation.

Average grid demandDemand
31.15 GWFull-day average from available snapshots
↓ −0.14 GW vs yesterday
Peak demand19:00
37.52 GWHighest 15-minute grid demand period
↓ −1.37 GW vs yesterday
Lowest demand23:45
24.60 GWLowest 15-minute grid demand period
↑ +2.41 GW vs yesterday
Domestic generationSupply
30.23 GWTracked UK generation sources only
↑ +1.55 GW vs yesterday
Average carbonCO₂
101 gCO₂/kWhCarbon intensity average
↓ −41 g vs yesterday
Renewable shareClean
59.0 %Wind, solar, hydro and biomass
↑ +11.4 pts vs yesterday
Clean share+ Nuclear
76.0 %Renewables plus nuclear
↑ +10.1 pts vs yesterday
Net importsFlow
-1.32 GWAverage imports minus exports
↓ −2.21 GW vs yesterday

Daily insight

What happened on the UK electricity grid?

On 28 September 2023, Britain’s electricity grid averaged 31.15 GW of grid demand, with renewables averaging 59.0% of tracked domestic generation and carbon intensity averaging 101 gCO₂/kWh.

The highest demand period was 37.52 GW at 19:00, while the lowest carbon intensity period was 51 gCO₂/kWh at 05:00.

Key records for 28 September 2023

Highest wind18.17 GW00:00
Highest solar3.47 GW13:00
Highest gas12.32 GW19:00
Lowest carbon51 gCO₂/kWh05:00
Highest imports2.75 GW10:00
Highest exports4.83 GW05:00

Daily chart

Demand, generation and carbon intensity

28 September 2023

Generation mix

Wind, solar, gas and interconnector flow