Electricity Live

Great Britain’s electricity on Saturday 25 September 2021

On Saturday 25 September, demand averaged 27.1 GW. Renewables supplied 16%.

27.1GW AVERAGEWind3.57 GW13%Hydro0.15 GW1%Biomass2.22 GW8%Solar0.79 GW3%Gas12.41 GW45%Imports3.16 GW12%Nuclear5.04 GW18%27.1GW AVERAGE13%8%45%12%18%
Price
£161.07/MWh
Day average £161.07
Demand27.1GW
Generation 24.2Transfers 2.9
Fossil fuels45%
Renewables16%
Other38%
Carbon intensityModerate
211g/kWh
0Day average 211300
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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 25 September 2021, gas supplied 45% of Great Britain’s electricity and nuclear 18%. Demand peaked at 31.6 GW at 19:30. Carbon intensity averaged 211 g/kWh and the price £161.07/MWh. Wind generation peaked at 6.0 GW at 00:00. Solar generation peaked at 3.1 GW at 13:30. Carbon intensity was lowest at 01:00 (161 g/kWh) and highest at 08:00 (237 g/kWh). The wholesale price ranged from £106.07/MWh at 03:00 to £216.01/MWh at 18:30. Gas made 51% of the electricity generated in Great Britain, compared with 42% across 2021.

Charts

Generation, demand, price and carbon

Generation by sourceGW · daily average below
Solar 0.792.9%Wind 3.5713.0%Gas 12.4145.4%Hydro 0.150.5%Biomass 2.228.1%Nuclear 5.0418.4%
Price£/MWh
Carbon intensitygCO₂/kWh
Demand and generationGW
Demand 27.1avgGeneration 24.2avgTransfers 2.9avg
The day in figurespeaks, averages, totals
Peak demand31.6GW · 19:30
Low 20.2 · 04:25Avg 27.10–40 GW
Made in Great Britain89%of demand
Generation 24.2Transfers 2.9 GW
Net imports68GWh
In
70 Out
2
Zero-carbon share39%of generation
Nuclear 21%Hydro 1%Wind 15%Solar 3%

Transfers · Sat 25 Sept

Interconnectors and storage

On Saturday 25 September 2021, Great Britain imported 70 GWh and exported 2 GWh through its interconnectors. The most came from France (25 GWh), and the most exports went to Ireland (2 GWh).

All interconnectors

Sat 25 Sept
Imported
70GWh
Exported
2GWh
Net in
68GWh
Average net flow
2.84GW in

Into Great BritainOut of Great Britain

Belgium

Nemo Link

Average0.88GWImporting

In 21.1 GWhOut 0.0 GWh

Denmark

Viking Link

Average0.00GWIdle

In 0.0 GWhOut 0.0 GWh

France

IFA · IFA2 · ElecLink

Average1.04GWImporting

In 25.0 GWhOut 0.0 GWh

Ireland

Moyle · East–West · Greenlink

Average0.01GWExporting

In 1.8 GWhOut 2.1 GWh

Netherlands

BritNed

Average0.93GWImporting

In 22.4 GWhOut 0.0 GWh

Norway

North Sea Link

Average0.00GWIdle

In 0.0 GWhOut 0.0 GWh

Pumped storage

Dinorwig · Cruachan · Ffestiniog · Foyers

Average0.08GWGenerating

Generated 5.4 GWhPumped 3.6 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.