Electricity Live

Great Britain’s electricity on Thursday 18 September 2025

On Thursday 18 September, demand averaged 30.3 GW. Renewables supplied 59%.

30.3GW AVERAGEWind17.04 GW53%Hydro0.34 GW1%Biomass1.75 GW5%Solar1.53 GW5%Gas5.58 GW17%Imports3.43 GW11%Nuclear2.51 GW8%30.3GW AVERAGE53%17%11%8%
Price
£64.56/MWh
Day average £64.56
Demand30.3GW
Generation 28.8Transfers 1.5
Fossil fuels17%
Renewables59%
Other24%
Carbon intensityLow
83g/kWh
0Day average 83300
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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 Thursday 18 September 2025, wind supplied 53% of Great Britain’s electricity and gas 17%. Demand peaked at 36.3 GW at 13:05. Carbon intensity averaged 83 g/kWh and the price £64.56/MWh. Wind generation peaked at 19.3 GW at 00:35. Solar generation peaked at 5.9 GW at 13:00. Carbon intensity was lowest at 23:00 (63 g/kWh) and highest at 17:30 (115 g/kWh). The wholesale price ranged from £17.75/MWh at 02:00 to £110.72/MWh at 18:30. 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 1.534.8%Wind 17.0452.9%Gas 5.5817.3%Hydro 0.341.1%Biomass 1.755.4%Nuclear 2.517.8%
Price£/MWh
Carbon intensitygCO₂/kWh
Demand and generationGW
Demand 30.3avgGeneration 28.8avgTransfers 1.5avg
The day in figurespeaks, averages, totals
Peak demand36.3GW · 13:05
Low 22.2 · 05:30Avg 30.30–40 GW
Made in Great Britain95%of demand
Generation 28.8Transfers 1.5 GW
Net imports39GWh
In
77 Out
38
Zero-carbon share75%of generation
Nuclear 9%Hydro 1%Wind 59%Solar 5%

Transfers · Thu 18 Sept

Interconnectors and storage

On Thursday 18 September 2025, Great Britain imported 77 GWh and exported 38 GWh through its interconnectors. The most came from France (33 GWh), and the most exports went to Ireland (17 GWh).

All interconnectors

Thu 18 Sept
Imported
77GWh
Exported
38GWh
Net in
39GWh
Average net flow
1.61GW in

Into Great BritainOut of Great Britain

Belgium

Nemo Link

Average0.37GWExporting

In 3.7 GWhOut 12.7 GWh

Denmark

Viking Link

Average0.92GWImporting

In 23.1 GWhOut 1.1 GWh

France

IFA · IFA2 · ElecLink

Average1.20GWImporting

In 32.9 GWhOut 4.1 GWh

Ireland

Moyle · East–West · Greenlink

Average0.67GWExporting

In 1.4 GWhOut 17.4 GWh

Netherlands

BritNed

Average0.00GWIdle

In 0.0 GWhOut 0.0 GWh

Norway

North Sea Link

Average0.54GWImporting

In 16.1 GWhOut 3.2 GWh

Pumped storage

Dinorwig · Cruachan · Ffestiniog · Foyers

Average0.10GWPumping

Generated 5.1 GWhPumped 7.4 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.