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

On 4 April 2025, Britain’s electricity grid averaged 31.95 GW of grid demand, with renewables averaging 67.1% of tracked domestic generation and carbon intensity averaging 72 gCO₂/kWh. Daily UK electricity demand, generation, carbon intensity, imports, exports and key records.

Avg demand 31.95 GW

Average grid demand for this UK day.

Peak demand 38.06 GW

Highest 15-minute grid demand period.

Avg carbon 72 gCO₂/kWh

Average carbon intensity where available.

Renewables 67.1 %

Average renewable share of tracked generation.

Average grid demandDemand
31.95 GWFull-day average from available snapshots
↓ −0.48 GW vs yesterday
Peak demand12:00
38.06 GWHighest 15-minute grid demand period
↑ +0.32 GW vs yesterday
Lowest demand03:15
24.04 GWLowest 15-minute grid demand period
↓ −1.38 GW vs yesterday
Domestic generationSupply
26.96 GWTracked UK generation sources only
↓ −0.49 GW vs yesterday
Average carbonCO₂
72 gCO₂/kWhCarbon intensity average
↓ −3 g vs yesterday
Renewable shareClean
67.1 %Wind, solar, hydro and biomass
↑ +1.5 pts vs yesterday
Clean share+ Nuclear
83.4 %Renewables plus nuclear
↑ +2.3 pts vs yesterday
Net importsFlow
3.86 GWAverage imports minus exports
↓ −0.04 GW vs yesterday

Daily insight

What happened on the UK electricity grid?

On 4 April 2025, Britain’s electricity grid averaged 31.95 GW of grid demand, with renewables averaging 67.1% of tracked domestic generation and carbon intensity averaging 72 gCO₂/kWh.

The highest demand period was 38.06 GW at 12:00, while the lowest carbon intensity period was 31 gCO₂/kWh at 15:00.

Key records for 4 April 2025

Highest wind16.84 GW20:00
Highest solar11.52 GW13:30
Highest gas7.94 GW06:30
Lowest carbon31 gCO₂/kWh15:00
Highest imports7.25 GW08:15
Highest exports3.15 GW05:45

Daily chart

Demand, generation and carbon intensity

4 April 2025

Generation mix

Wind, solar, gas and interconnector flow