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

On 21 March 2023, Britain’s electricity grid averaged 32.37 GW of grid demand, with renewables averaging 62.0% of tracked domestic generation and carbon intensity averaging 100 gCO₂/kWh. Daily UK electricity demand, generation, carbon intensity, imports, exports and key records.

Avg demand 32.37 GW

Average grid demand for this UK day.

Peak demand 38.30 GW

Highest 15-minute grid demand period.

Avg carbon 100 gCO₂/kWh

Average carbon intensity where available.

Renewables 62.0 %

Average renewable share of tracked generation.

Average grid demandDemand
32.37 GWFull-day average from available snapshots
↑ +0.34 GW vs yesterday
Peak demand18:00
38.30 GWHighest 15-minute grid demand period
↓ −1.19 GW vs yesterday
Lowest demand03:15
23.11 GWLowest 15-minute grid demand period
↑ +0.99 GW vs yesterday
Domestic generationSupply
29.73 GWTracked UK generation sources only
↑ +1.46 GW vs yesterday
Average carbonCO₂
100 gCO₂/kWhCarbon intensity average
↓ −82 g vs yesterday
Renewable shareClean
62.0 %Wind, solar, hydro and biomass
↑ +24.6 pts vs yesterday
Clean share+ Nuclear
75.4 %Renewables plus nuclear
↑ +24.1 pts vs yesterday
Net importsFlow
2.68 GWAverage imports minus exports
↓ −1.11 GW vs yesterday

Daily insight

What happened on the UK electricity grid?

On 21 March 2023, Britain’s electricity grid averaged 32.37 GW of grid demand, with renewables averaging 62.0% of tracked domestic generation and carbon intensity averaging 100 gCO₂/kWh.

The highest demand period was 38.30 GW at 18:00, while the lowest carbon intensity period was 67 gCO₂/kWh at 23:30.

Key records for 21 March 2023

Highest wind18.52 GW23:30
Highest solar5.19 GW13:00
Highest gas10.25 GW18:30
Lowest carbon67 gCO₂/kWh23:30
Highest imports5.91 GW09:00
Highest exports2.42 GW05:15

Daily chart

Demand, generation and carbon intensity

21 March 2023

Generation mix

Wind, solar, gas and interconnector flow