Electricity Live

Great Britain’s electricity on Friday 19 September 2025

On Friday 19 September, demand averaged 28.7 GW. Renewables supplied 46%.

28.7GW AVERAGEWind10.93 GW36%Hydro0.40 GW1%Biomass2.43 GW8%Solar2.52 GW8%Gas7.07 GW23%Imports4.57 GW15%Nuclear2.52 GW8%28.7GW AVERAGE36%8%8%23%15%8%
Price
£66.76/MWh
Day average £66.76
Demand28.7GW
Generation 25.9Transfers 2.8
Fossil fuels23%
Renewables46%
Other31%
Carbon intensityLow
114g/kWh
0Day average 114300
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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 19 September 2025, wind supplied 36% of Great Britain’s electricity and gas 23%. Demand peaked at 35.3 GW at 11:30. Carbon intensity averaged 114 g/kWh and the price £66.76/MWh. Wind generation peaked at 16.5 GW at 03:05. Solar generation peaked at 9.4 GW at 12:30. Carbon intensity was lowest at 03:00 (56 g/kWh) and highest at 18:00 (198 g/kWh). The wholesale price ranged from −£1.25/MWh at 04:30 to £127.02/MWh at 18:30. The price was below zero for 0.5 hours. Wind made 42% 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 2.528.3%Wind 10.9335.9%Gas 7.0723.2%Hydro 0.401.3%Biomass 2.438.0%Nuclear 2.528.3%
Price£/MWh
Carbon intensitygCO₂/kWh
Demand and generationGW
Demand 28.7avgGeneration 25.9avgTransfers 2.8avg
The day in figurespeaks, averages, totals
Peak demand35.3GW · 11:30
Low 21.7 · 04:45Avg 28.70–40 GW
Made in Great Britain90%of demand
Generation 25.9Transfers 2.8 GW
Net imports69GWh
In
107 Out
38
Zero-carbon share63%of generation
Nuclear 10%Hydro 2%Wind 42%Solar 10%

Transfers · Fri 19 Sept

Interconnectors and storage

On Friday 19 September 2025, Great Britain imported 107 GWh and exported 38 GWh through its interconnectors. The most came from France (49 GWh), and the most exports went to Ireland (28 GWh).

All interconnectors

Fri 19 Sept
Imported
107GWh
Exported
38GWh
Net in
69GWh
Average net flow
2.86GW in

Into Great BritainOut of Great Britain

Belgium

Nemo Link

Average0.02GWImporting

In 9.6 GWhOut 9.1 GWh

Denmark

Viking Link

Average0.66GWImporting

In 17.2 GWhOut 1.4 GWh

France

IFA · IFA2 · ElecLink

Average2.03GWImporting

In 48.8 GWhOut 0.0 GWh

Ireland

Moyle · East–West · Greenlink

Average1.16GWExporting

In 0.0 GWhOut 27.9 GWh

Netherlands

BritNed

Average0.00GWIdle

In 0.0 GWhOut 0.0 GWh

Norway

North Sea Link

Average1.31GWImporting

In 31.4 GWhOut 0.0 GWh

Pumped storage

Dinorwig · Cruachan · Ffestiniog · Foyers

Average0.06GWPumping

Generated 2.7 GWhPumped 4.1 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.