Electricity Live

Great Britain’s electricity on Friday 12 September 2025

On Friday 12 September, demand averaged 28.3 GW. Renewables supplied 64%.

28.3GW AVERAGEWind16.85 GW53%Hydro0.42 GW1%Biomass1.00 GW3%Solar3.01 GW9%Gas3.82 GW12%Imports3.32 GW10%Nuclear3.30 GW10%28.3GW AVERAGE53%9%12%10%10%
Price
£24.30/MWh
Day average £24.30
Demand28.3GW
Generation 28.4Transfers −0.1
Fossil fuels12%
Renewables64%
Other24%
Carbon intensityLow
63g/kWh
0Day average 63300
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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 Friday 12 September 2025, wind supplied 53% of Great Britain’s electricity and gas 12%. Demand peaked at 33.9 GW at 10:45. Carbon intensity averaged 63 g/kWh and the price £24.30/MWh. Wind generation peaked at 19.3 GW at 02:50. Solar generation peaked at 9.5 GW at 13:00. Carbon intensity was lowest at 13:00 (34 g/kWh) and highest at 19:00 (126 g/kWh). The wholesale price ranged from −£12.50/MWh at 01:30 to £112.69/MWh at 19:30. The price was below zero for 11.5 hours. Wind made 59% 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 3.019.5%Wind 16.8553.1%Gas 3.8212.1%Hydro 0.421.3%Biomass 1.003.1%Nuclear 3.3010.4%
Price£/MWh
Carbon intensitygCO₂/kWh
Demand and generationGW
Demand 28.3avgGeneration 28.4avgTransfers −0.1avg
The day in figurespeaks, averages, totals
Peak demand33.9GW · 10:45
Low 20.7 · 04:10Avg 28.30–40 GW
Made in Great Britain101%of demand
Generation 28.4Transfers −0.1 GW
Net exports2GWh
In
75 Out
77
Zero-carbon share83%of generation
Nuclear 12%Hydro 1%Wind 59%Solar 11%

Transfers · Fri 12 Sept

Interconnectors and storage

On Friday 12 September 2025, Great Britain imported 75 GWh and exported 77 GWh through its interconnectors. The most came from France (55 GWh), and the most exports went to Ireland (31 GWh).

All interconnectors

Fri 12 Sept
Imported
75GWh
Exported
77GWh
Net out
2GWh
Average net flow
0.07GW out

Into Great BritainOut of Great Britain

Belgium

Nemo Link

Average0.34GWExporting

In 1.3 GWhOut 9.6 GWh

Denmark

Viking Link

Average0.28GWExporting

In 6.5 GWhOut 13.2 GWh

France

IFA · IFA2 · ElecLink

Average2.31GWImporting

In 55.3 GWhOut 0.0 GWh

Ireland

Moyle · East–West · Greenlink

Average1.31GWExporting

In 0.0 GWhOut 31.4 GWh

Netherlands

BritNed

Average0.50GWExporting

In 1.8 GWhOut 13.7 GWh

Norway

North Sea Link

Average0.05GWImporting

In 10.2 GWhOut 8.9 GWh

Pumped storage

Dinorwig · Cruachan · Ffestiniog · Foyers

Average0.07GWPumping

Generated 4.4 GWhPumped 6.2 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.