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Daily UK grid report
UK Electricity Grid Daily Report — 21 July 2023

On 21 July 2023, Britain’s electricity grid averaged 28.11 GW of grid demand, with renewables averaging 29.6% of tracked domestic generation and carbon intensity averaging 207 gCO₂/kWh. Daily UK electricity demand, generation, carbon intensity, imports, exports and key records.

Avg demand 28.11 GW

Average grid demand for this UK day.

Peak demand 34.25 GW

Highest 15-minute grid demand period.

Avg carbon 207 gCO₂/kWh

Average carbon intensity where available.

Renewables 29.6 %

Average renewable share of tracked generation.

Average grid demandDemand
28.11 GWFull-day average from available snapshots
↓ −0.79 GW vs yesterday
Peak demand11:00
34.25 GWHighest 15-minute grid demand period
↑ +0.17 GW vs yesterday
Lowest demand03:30
21.90 GWLowest 15-minute grid demand period
↓ −1.41 GW vs yesterday
Domestic generationSupply
25.53 GWTracked UK generation sources only
↓ −0.17 GW vs yesterday
Average carbonCO₂
207 gCO₂/kWhCarbon intensity average
↓ −2 g vs yesterday
Renewable shareClean
29.6 %Wind, solar, hydro and biomass
↑ +1.5 pts vs yesterday
Clean share+ Nuclear
47.1 %Renewables plus nuclear
↑ +1.6 pts vs yesterday
Net importsFlow
1.33 GWAverage imports minus exports
↓ −0.41 GW vs yesterday

Daily insight

What happened on the UK electricity grid?

On 21 July 2023, Britain’s electricity grid averaged 28.11 GW of grid demand, with renewables averaging 29.6% of tracked domestic generation and carbon intensity averaging 207 gCO₂/kWh.

The highest demand period was 34.25 GW at 11:00, while the lowest carbon intensity period was 170 gCO₂/kWh at 11:00.

Key records for 21 July 2023

Highest wind4.68 GW11:30
Highest solar6.90 GW11:00
Highest gas13.90 GW19:30
Lowest carbon170 gCO₂/kWh11:00
Highest imports4.70 GW19:00
Highest exports3.87 GW05:15

Daily chart

Demand, generation and carbon intensity

21 July 2023

Generation mix

Wind, solar, gas and interconnector flow