Electricity Live

Great Britain’s electricity on Monday 29 September 2025

On Monday 29 September, demand averaged 29.2 GW. Renewables supplied 18%.

29.2GW AVERAGEWind2.57 GW8%Hydro0.40 GW1%Biomass3.24 GW10%Solar2.52 GW8%Gas15.05 GW48%Imports4.96 GW16%Nuclear2.51 GW8%29.2GW AVERAGE8%10%8%48%16%8%
Price
£87.15/MWh
Day average £87.15
Demand29.2GW
Generation 26.3Transfers 2.9
Fossil fuels48%
Renewables18%
Other34%
Carbon intensityHigh
215g/kWh
0Day average 215300
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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 Monday 29 September 2025, gas supplied 48% of Great Britain’s electricity and biomass 10%. Demand peaked at 35.5 GW at 11:00. Carbon intensity averaged 215 g/kWh and the price £87.15/MWh. Wind generation peaked at 5.1 GW at 23:50. Solar generation peaked at 10.5 GW at 11:30. Carbon intensity was lowest at 11:30 (161 g/kWh) and highest at 06:00 (252 g/kWh). The wholesale price ranged from £66.97/MWh at 13:00 to £131.23/MWh at 17:00. Gas made 57% of the electricity generated in Great Britain, compared with 32% across 2025.

Charts

Generation, demand, price and carbon

Generation by sourceGW · daily average below
Solar 2.528.1%Wind 2.578.2%Gas 15.0548.2%Hydro 0.401.3%Biomass 3.2410.4%Nuclear 2.518.0%
Price£/MWh
Carbon intensitygCO₂/kWh
Demand and generationGW
Demand 29.2avgGeneration 26.3avgTransfers 2.9avg
The day in figurespeaks, averages, totals
Peak demand35.5GW · 11:00
Low 20.8 · 04:00Avg 29.20–40 GW
Made in Great Britain90%of demand
Generation 26.3Transfers 2.9 GW
Net imports73GWh
In
115 Out
42
Zero-carbon share30%of generation
Nuclear 10%Hydro 2%Wind 10%Solar 10%

Transfers · Mon 29 Sept

Interconnectors and storage

On Monday 29 September 2025, Great Britain imported 115 GWh and exported 42 GWh through its interconnectors. The most came from France (60 GWh), and the most exports went to Ireland (16 GWh).

All interconnectors

Mon 29 Sept
Imported
115GWh
Exported
42GWh
Net in
73GWh
Average net flow
3.03GW in

Into Great BritainOut of Great Britain

Belgium

Nemo Link

Average0.54GWImporting

In 14.7 GWhOut 1.8 GWh

Denmark

Viking Link

Average0.51GWExporting

In 2.3 GWhOut 14.5 GWh

France

IFA · IFA2 · ElecLink

Average2.49GWImporting

In 59.7 GWhOut 0.0 GWh

Ireland

Moyle · East–West · Greenlink

Average0.63GWExporting

In 0.4 GWhOut 15.5 GWh

Netherlands

BritNed

Average0.25GWExporting

In 4.4 GWhOut 10.5 GWh

Norway

North Sea Link

Average1.40GWImporting

In 33.5 GWhOut 0.0 GWh

Pumped storage

Dinorwig · Cruachan · Ffestiniog · Foyers

Average0.13GWPumping

Generated 3.9 GWhPumped 7.1 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.