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Daily UK grid report
UK Electricity Grid Daily Report — 18 December 2024

On 18 December 2024, Britain’s electricity grid averaged 37.04 GW of grid demand, with renewables averaging 64.9% of tracked domestic generation and carbon intensity averaging 78 gCO₂/kWh. Daily UK electricity demand, generation, carbon intensity, imports, exports and key records.

Avg demand 37.04 GW

Average grid demand for this UK day.

Peak demand 42.77 GW

Highest 15-minute grid demand period.

Avg carbon 78 gCO₂/kWh

Average carbon intensity where available.

Renewables 64.9 %

Average renewable share of tracked generation.

Average grid demandDemand
37.04 GWFull-day average from available snapshots
↓ −0.40 GW vs yesterday
Peak demand17:00
42.77 GWHighest 15-minute grid demand period
↓ −3.20 GW vs yesterday
Lowest demand23:15
28.45 GWLowest 15-minute grid demand period
↑ +2.75 GW vs yesterday
Domestic generationSupply
33.14 GWTracked UK generation sources only
↓ −1.54 GW vs yesterday
Average carbonCO₂
78 gCO₂/kWhCarbon intensity average
↓ −34 g vs yesterday
Renewable shareClean
64.9 %Wind, solar, hydro and biomass
↑ +7.4 pts vs yesterday
Clean share+ Nuclear
78.9 %Renewables plus nuclear
↑ +7.6 pts vs yesterday
Net importsFlow
2.42 GWAverage imports minus exports
↑ +1.00 GW vs yesterday

Daily insight

What happened on the UK electricity grid?

On 18 December 2024, Britain’s electricity grid averaged 37.04 GW of grid demand, with renewables averaging 64.9% of tracked domestic generation and carbon intensity averaging 78 gCO₂/kWh.

The highest demand period was 42.77 GW at 17:00, while the lowest carbon intensity period was 47 gCO₂/kWh at 04:00.

Key records for 18 December 2024

Highest wind22.51 GW03:30
Highest solar2.20 GW11:00
Highest gas12.25 GW17:00
Lowest carbon47 gCO₂/kWh04:00
Highest imports6.90 GW22:15
Highest exports5.46 GW02:30

Daily chart

Demand, generation and carbon intensity

18 December 2024

Generation mix

Wind, solar, gas and interconnector flow