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Daily UK grid report
UK Electricity Grid Daily Report — 31 March 2025

On 31 March 2025, Britain’s electricity grid averaged 31.82 GW of grid demand, with renewables averaging 33.2% of tracked domestic generation and carbon intensity averaging 176 gCO₂/kWh. Daily UK electricity demand, generation, carbon intensity, imports, exports and key records.

Avg demand 31.82 GW

Average grid demand for this UK day.

Peak demand 37.40 GW

Highest 15-minute grid demand period.

Avg carbon 176 gCO₂/kWh

Average carbon intensity where available.

Renewables 33.2 %

Average renewable share of tracked generation.

Average grid demandDemand
31.82 GWFull-day average from available snapshots
↓ −0.05 GW vs yesterday
Peak demand10:00
37.40 GWHighest 15-minute grid demand period
↑ +0.66 GW vs yesterday
Lowest demand03:45
24.37 GWLowest 15-minute grid demand period
↓ −1.48 GW vs yesterday
Domestic generationSupply
25.22 GWTracked UK generation sources only
↓ −3.59 GW vs yesterday
Average carbonCO₂
176 gCO₂/kWhCarbon intensity average
↑ +104 g vs yesterday
Renewable shareClean
33.2 %Wind, solar, hydro and biomass
↓ −32.8 pts vs yesterday
Clean share+ Nuclear
49.2 %Renewables plus nuclear
↓ −30.2 pts vs yesterday
Net importsFlow
5.46 GWAverage imports minus exports
↑ +4.29 GW vs yesterday

Daily insight

What happened on the UK electricity grid?

On 31 March 2025, Britain’s electricity grid averaged 31.82 GW of grid demand, with renewables averaging 33.2% of tracked domestic generation and carbon intensity averaging 176 gCO₂/kWh.

The highest demand period was 37.40 GW at 10:00, while the lowest carbon intensity period was 130 gCO₂/kWh at 13:30.

Key records for 31 March 2025

Highest wind4.81 GW23:30
Highest solar11.40 GW13:30
Highest gas17.74 GW20:30
Lowest carbon130 gCO₂/kWh13:30
Highest imports8.45 GW00:00
Highest exports1.88 GW18:00

Daily chart

Demand, generation and carbon intensity

31 March 2025

Generation mix

Wind, solar, gas and interconnector flow