Electricity Live

Great Britain’s electricity on Monday 12 May 2025

On Monday 12 May, demand averaged 28.1 GW. Renewables supplied 37%.

28.1GW AVERAGEWind6.84 GW23%Hydro0.15 GW1%Biomass2.68 GW9%Solar3.76 GW13%Gas6.47 GW22%Imports5.39 GW18%Nuclear4.15 GW14%28.1GW AVERAGE23%9%13%22%18%14%
Price
£87.66/MWh
Day average £87.66
Demand28.1GW
Generation 24.0Transfers 4.0
Fossil fuels22%
Renewables37%
Other42%
Carbon intensityModerate
111g/kWh
0Day average 111300
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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 Monday 12 May 2025, wind supplied 23% of Great Britain’s electricity and gas 22%. Demand peaked at 34.9 GW at 12:35. Carbon intensity averaged 111 g/kWh and the price £87.66/MWh. Wind generation peaked at 8.9 GW at 19:05. Solar generation peaked at 11.5 GW at 13:00. Carbon intensity was lowest at 13:00 (74 g/kWh) and highest at 07:00 (150 g/kWh). The wholesale price ranged from £69.66/MWh at 00:00 to £105.62/MWh at 08:30. Wind made 28% 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 3.7612.8%Wind 6.8423.2%Gas 6.4722.0%Hydro 0.150.5%Biomass 2.689.1%Nuclear 4.1514.1%
Price£/MWh
Carbon intensitygCO₂/kWh
Demand and generationGW
Demand 28.1avgGeneration 24.0avgTransfers 4.0avg
The day in figurespeaks, averages, totals
Peak demand34.9GW · 12:35
Low 19.6 · 04:35Avg 28.10–40 GW
Made in Great Britain86%of demand
Generation 24.0Transfers 4.0 GW
Net imports97GWh
In
129 Out
32
Zero-carbon share62%of generation
Nuclear 17%Hydro 1%Wind 28%Solar 16%

Transfers · Mon 12 May

Interconnectors and storage

On Monday 12 May 2025, Great Britain imported 129 GWh and exported 32 GWh through its interconnectors. The most came from France (84 GWh), and the most exports went to Ireland (27 GWh).

All interconnectors

Mon 12 May
Imported
129GWh
Exported
32GWh
Net in
97GWh
Average net flow
4.06GW in

Into Great BritainOut of Great Britain

Belgium

Nemo Link

Average0.34GWImporting

In 10.9 GWhOut 2.9 GWh

Denmark

Viking Link

Average0.13GWImporting

In 3.5 GWhOut 0.5 GWh

France

IFA · IFA2 · ElecLink

Average3.48GWImporting

In 83.6 GWhOut 0.0 GWh

Ireland

Moyle · East–West · Greenlink

Average1.11GWExporting

In 0.0 GWhOut 26.7 GWh

Netherlands

BritNed

Average0.07GWExporting

In 0.2 GWhOut 1.9 GWh

Norway

North Sea Link

Average1.30GWImporting

In 31.1 GWhOut 0.0 GWh

Pumped storage

Dinorwig · Cruachan · Ffestiniog · Foyers

Average0.02GWPumping

Generated 0.1 GWhPumped 0.6 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.