Electricity Live

Great Britain’s electricity on Sunday 4 May 2025

On Sunday 4 May, demand averaged 25.2 GW. Renewables supplied 52%.

25.2GW AVERAGEWind10.79 GW40%Hydro0.12 GW0%Biomass1.37 GW5%Solar3.00 GW11%Gas3.29 GW12%Imports4.88 GW18%Nuclear3.40 GW13%25.2GW AVERAGE40%11%12%18%13%
Price
£24.83/MWh
Day average £24.83
Demand25.2GW
Generation 22.0Transfers 3.3
Fossil fuels12%
Renewables52%
Other36%
Carbon intensityLow
69g/kWh
0Day average 69300
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Recorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hour

Key moments

On Sunday 4 May 2025, wind supplied 40% of Great Britain’s electricity and nuclear 13%. Demand peaked at 30.1 GW at 17:55. Carbon intensity averaged 69 g/kWh and the price £24.83/MWh. Wind generation peaked at 12.6 GW at 18:15. Solar generation peaked at 8.8 GW at 12:00. Carbon intensity was lowest at 12:30 (52 g/kWh) and highest at 20:00 (92 g/kWh). The wholesale price ranged from −£8.71/MWh at 07:30 to £89.06/MWh at 20:30. The price was below zero for 7.5 hours. Wind made 49% of the electricity generated in Great Britain, compared with 35% across 2025.

Charts

Generation, demand, price and carbon

Generation by sourceGW · daily average below
Solar 3.0011.2%Wind 10.7940.2%Gas 3.2912.2%Hydro 0.120.4%Biomass 1.375.1%Nuclear 3.4012.7%
Price£/MWh
Carbon intensitygCO₂/kWh
Demand and generationGW
Demand 25.2avgGeneration 22.0avgTransfers 3.3avg
The day in figurespeaks, averages, totals
Peak demand30.1GW · 17:55
Low 19.0 · 05:20Avg 25.20–40 GW
Made in Great Britain87%of demand
Generation 22.0Transfers 3.3 GW
Net imports82GWh
In
116 Out
33
Zero-carbon share79%of generation
Nuclear 15%Hydro 1%Wind 49%Solar 14%

Transfers · Sun 4 May

Interconnectors and storage

On Sunday 4 May 2025, Great Britain imported 116 GWh and exported 33 GWh through its interconnectors. The most came from France (79 GWh), and the most exports went to Ireland (22 GWh).

All interconnectors

Sun 4 May
Imported
116GWh
Exported
33GWh
Net in
82GWh
Average net flow
3.43GW in

Into Great BritainOut of Great Britain

Belgium

Nemo Link

Average0.06GWImporting

In 5.7 GWhOut 4.3 GWh

Denmark

Viking Link

Average0.12GWImporting

In 6.4 GWhOut 3.6 GWh

France

IFA · IFA2 · ElecLink

Average3.28GWImporting

In 78.7 GWhOut 0.0 GWh

Ireland

Moyle · East–West · Greenlink

Average0.90GWExporting

In 0.0 GWhOut 21.6 GWh

Netherlands

BritNed

Average0.02GWExporting

In 3.5 GWhOut 3.9 GWh

Norway

North Sea Link

Average0.89GWImporting

In 21.5 GWhOut 0.0 GWh

Pumped storage

Dinorwig · Cruachan · Ffestiniog · Foyers

Average0.18GWPumping

Generated 1.3 GWhPumped 5.6 GWh

All cards share one scale, so you can compare their heights. Each country can have more than one cable.

Download the 5-minute data for this day: CSV · JSON. See what the figures mean.