Electricity Live

Great Britain’s electricity on Saturday 13 September 2025

On Saturday 13 September, demand averaged 26.0 GW. Renewables supplied 54%.

26.0GW AVERAGEWind11.80 GW42%Hydro0.47 GW2%Biomass1.08 GW4%Solar2.80 GW10%Gas3.74 GW13%Imports4.76 GW17%Nuclear3.31 GW12%26.0GW AVERAGE42%10%13%17%12%
Price
£34.37/MWh
Day average £34.37
Demand26.0GW
Generation 23.2Transfers 2.8
Fossil fuels13%
Renewables54%
Other33%
Carbon intensityLow
76g/kWh
0Day average 76300
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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 Saturday 13 September 2025, wind supplied 42% of Great Britain’s electricity and gas 13%. Demand peaked at 31.0 GW at 11:00. Carbon intensity averaged 76 g/kWh and the price £34.37/MWh. Wind generation peaked at 14.6 GW at 01:40. Solar generation peaked at 9.3 GW at 14:00. Carbon intensity was lowest at 14:30 (51 g/kWh) and highest at 19:00 (139 g/kWh). The wholesale price ranged from −£10.14/MWh at 14:00 to £103.91/MWh at 19:30. The price was below zero for 6 hours. Wind made 51% 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 2.8010.0%Wind 11.8042.2%Gas 3.7413.4%Hydro 0.471.7%Biomass 1.083.9%Nuclear 3.3111.8%
Price£/MWh
Carbon intensitygCO₂/kWh
Demand and generationGW
Demand 26.0avgGeneration 23.2avgTransfers 2.8avg
The day in figurespeaks, averages, totals
Peak demand31.0GW · 11:00
Low 20.0 · 05:00Avg 26.00–40 GW
Made in Great Britain89%of demand
Generation 23.2Transfers 2.8 GW
Net imports68GWh
In
109 Out
41
Zero-carbon share79%of generation
Nuclear 14%Hydro 2%Wind 51%Solar 12%

Transfers · Sat 13 Sept

Interconnectors and storage

On Saturday 13 September 2025, Great Britain imported 109 GWh and exported 41 GWh through its interconnectors. The most came from France (58 GWh), and the most exports went to Ireland (28 GWh).

All interconnectors

Sat 13 Sept
Imported
109GWh
Exported
41GWh
Net in
68GWh
Average net flow
2.82GW in

Into Great BritainOut of Great Britain

Belgium

Nemo Link

Average0.34GWImporting

In 11.5 GWhOut 3.4 GWh

Denmark

Viking Link

Average0.64GWImporting

In 15.3 GWhOut 0.0 GWh

France

IFA · IFA2 · ElecLink

Average2.42GWImporting

In 58.1 GWhOut 0.0 GWh

Ireland

Moyle · East–West · Greenlink

Average1.17GWExporting

In 0.0 GWhOut 28.0 GWh

Netherlands

BritNed

Average0.04GWExporting

In 8.4 GWhOut 9.4 GWh

Norway

North Sea Link

Average0.64GWImporting

In 15.5 GWhOut 0.2 GWh

Pumped storage

Dinorwig · Cruachan · Ffestiniog · Foyers

Average0.06GWPumping

Generated 5.3 GWhPumped 6.9 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.