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Daily UK grid report
UK Electricity Grid Daily Report — 4 July 2025

On 4 July 2025, Britain’s electricity grid averaged 31.20 GW of grid demand, with renewables averaging 66.4% of tracked domestic generation and carbon intensity averaging 76 gCO₂/kWh. Daily UK electricity demand, generation, carbon intensity, imports, exports and key records.

Avg demand 31.20 GW

Average grid demand for this UK day.

Peak demand 38.48 GW

Highest 15-minute grid demand period.

Avg carbon 76 gCO₂/kWh

Average carbon intensity where available.

Renewables 66.4 %

Average renewable share of tracked generation.

Average grid demandDemand
31.20 GWFull-day average from available snapshots
↑ +1.82 GW vs yesterday
Peak demand13:30
38.48 GWHighest 15-minute grid demand period
↑ +2.38 GW vs yesterday
Lowest demand01:45
23.97 GWLowest 15-minute grid demand period
↑ +1.98 GW vs yesterday
Domestic generationSupply
28.38 GWTracked UK generation sources only
↑ +3.65 GW vs yesterday
Average carbonCO₂
76 gCO₂/kWhCarbon intensity average
↓ −21 g vs yesterday
Renewable shareClean
66.4 %Wind, solar, hydro and biomass
↑ +9.1 pts vs yesterday
Clean share+ Nuclear
82.8 %Renewables plus nuclear
↑ +5.7 pts vs yesterday
Net importsFlow
0.65 GWAverage imports minus exports
↓ −2.83 GW vs yesterday

Daily insight

What happened on the UK electricity grid?

On 4 July 2025, Britain’s electricity grid averaged 31.20 GW of grid demand, with renewables averaging 66.4% of tracked domestic generation and carbon intensity averaging 76 gCO₂/kWh.

The highest demand period was 38.48 GW at 13:30, while the lowest carbon intensity period was 33 gCO₂/kWh at 14:30.

Key records for 4 July 2025

Highest wind17.85 GW14:30
Highest solar11.95 GW13:30
Highest gas5.64 GW23:00
Lowest carbon33 gCO₂/kWh14:30
Highest imports6.82 GW09:00
Highest exports4.89 GW23:00

Daily chart

Demand, generation and carbon intensity

4 July 2025

Generation mix

Wind, solar, gas and interconnector flow