Electricity Live

Great Britain’s electricity on Tuesday 16 September 2025

On Tuesday 16 September, demand averaged 29.7 GW. Renewables supplied 61%.

29.7GW AVERAGEWind16.45 GW52%Hydro0.36 GW1%Biomass1.21 GW4%Solar2.59 GW8%Gas4.57 GW14%Imports3.88 GW12%Nuclear2.50 GW8%29.7GW AVERAGE52%8%14%12%8%
Price
£36.02/MWh
Day average £36.02
Demand29.7GW
Generation 27.7Transfers 2.0
Fossil fuels14%
Renewables61%
Other24%
Carbon intensityLow
73g/kWh
0Day average 73300
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Recorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hour

Records set on this day

All records

Key moments

On Tuesday 16 September 2025, wind supplied 52% of Great Britain’s electricity and gas 14%. Demand peaked at 35.9 GW at 13:30. Carbon intensity averaged 73 g/kWh and the price £36.02/MWh. Wind generation peaked at 18.9 GW at 01:20. Solar generation peaked at 9.2 GW at 13:30. Carbon intensity was lowest at 05:30 (52 g/kWh) and highest at 18:30 (125 g/kWh). The wholesale price ranged from −£13.99/MWh at 03:30 to £105.31/MWh at 19:30. The price was below zero for 4.5 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 2.598.2%Wind 16.4552.1%Gas 4.5714.5%Hydro 0.361.1%Biomass 1.213.8%Nuclear 2.507.9%
Price£/MWh
Carbon intensitygCO₂/kWh
Demand and generationGW
Demand 29.7avgGeneration 27.7avgTransfers 2.0avg
The day in figurespeaks, averages, totals
Peak demand35.9GW · 13:30
Low 21.5 · 04:35Avg 29.70–40 GW
Made in Great Britain93%of demand
Generation 27.7Transfers 2.0 GW
Net imports49GWh
In
88 Out
39
Zero-carbon share79%of generation
Nuclear 9%Hydro 1%Wind 59%Solar 9%

Transfers · Tue 16 Sept

Interconnectors and storage

On Tuesday 16 September 2025, Great Britain imported 88 GWh and exported 39 GWh through its interconnectors. The most came from France (49 GWh), and the most exports went to Ireland (30 GWh).

All interconnectors

Tue 16 Sept
Imported
88GWh
Exported
39GWh
Net in
49GWh
Average net flow
2.05GW in

Into Great BritainOut of Great Britain

Belgium

Nemo Link

Average0.09GWImporting

In 4.7 GWhOut 2.6 GWh

Denmark

Viking Link

Average0.56GWImporting

In 17.7 GWhOut 4.2 GWh

France

IFA · IFA2 · ElecLink

Average2.04GWImporting

In 49.4 GWhOut 0.4 GWh

Ireland

Moyle · East–West · Greenlink

Average1.23GWExporting

In 0.5 GWhOut 29.9 GWh

Netherlands

BritNed

Average0.00GWIdle

In 0.0 GWhOut 0.0 GWh

Norway

North Sea Link

Average0.59GWImporting

In 15.7 GWhOut 1.6 GWh

Pumped storage

Dinorwig · Cruachan · Ffestiniog · Foyers

Average0.03GWPumping

Generated 5.0 GWhPumped 5.7 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.