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Daily UK grid report
UK Electricity Grid Daily Report — 17 May 2025

On 17 May 2025, Britain’s electricity grid averaged 27.32 GW of grid demand, with renewables averaging 53.6% of tracked domestic generation and carbon intensity averaging 83 gCO₂/kWh. Daily UK electricity demand, generation, carbon intensity, imports, exports and key records.

Avg demand 27.32 GW

Average grid demand for this UK day.

Peak demand 32.55 GW

Highest 15-minute grid demand period.

Avg carbon 83 gCO₂/kWh

Average carbon intensity where available.

Renewables 53.6 %

Average renewable share of tracked generation.

Average grid demandDemand
27.32 GWFull-day average from available snapshots
↓ −2.54 GW vs yesterday
Peak demand12:00
32.55 GWHighest 15-minute grid demand period
↓ −2.47 GW vs yesterday
Lowest demand04:30
21.85 GWLowest 15-minute grid demand period
↓ −1.88 GW vs yesterday
Domestic generationSupply
22.79 GWTracked UK generation sources only
↓ −2.16 GW vs yesterday
Average carbonCO₂
83 gCO₂/kWhCarbon intensity average
↑ +3 g vs yesterday
Renewable shareClean
53.6 %Wind, solar, hydro and biomass
↓ −2.7 pts vs yesterday
Clean share+ Nuclear
77.1 %Renewables plus nuclear
↓ −0.5 pts vs yesterday
Net importsFlow
3.20 GWAverage imports minus exports
↓ −0.30 GW vs yesterday

Daily insight

What happened on the UK electricity grid?

On 17 May 2025, Britain’s electricity grid averaged 27.32 GW of grid demand, with renewables averaging 53.6% of tracked domestic generation and carbon intensity averaging 83 gCO₂/kWh.

The highest demand period was 32.55 GW at 12:00, while the lowest carbon intensity period was 36 gCO₂/kWh at 15:00.

Key records for 17 May 2025

Highest wind8.87 GW22:00
Highest solar12.82 GW14:00
Highest gas8.81 GW19:30
Lowest carbon36 gCO₂/kWh15:00
Highest imports6.44 GW08:45
Highest exports2.74 GW19:30

Daily chart

Demand, generation and carbon intensity

17 May 2025

Generation mix

Wind, solar, gas and interconnector flow