Electricity Live

Great Britain’s electricity on Saturday 18 September 2021

On Saturday 18 September, demand averaged 26.7 GW. Renewables supplied 14%.

26.7GW AVERAGEWind2.03 GW8%Hydro0.13 GW0%Biomass1.58 GW6%Solar1.61 GW6%Gas13.19 GW49%Coal0.49 GW2%Imports3.18 GW12%Nuclear4.83 GW18%26.7GW AVERAGE8%49%12%18%
Price
£169.94/MWh
Day average £169.94
Demand26.7GW
Generation 23.9Transfers 2.8
Fossil fuels49%
Renewables14%
Other35%
Carbon intensityHigh
239g/kWh
0Day average 239300
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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 18 September 2021, gas supplied 49% of Great Britain’s electricity and nuclear 18%. Demand peaked at 31.5 GW at 12:20. Carbon intensity averaged 239 g/kWh and the price £169.94/MWh. Wind generation peaked at 5.8 GW at 23:55. Solar generation peaked at 6.4 GW at 12:00. Carbon intensity was lowest at 23:30 (188 g/kWh) and highest at 07:30 (268 g/kWh). The wholesale price ranged from £119.39/MWh at 23:00 to £247.99/MWh at 09:00. Gas made 55% 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 1.615.9%Wind 2.037.5%Gas 13.1948.8%Hydro 0.130.5%Biomass 1.585.8%Nuclear 4.8317.9%Coal 0.491.8%
Price£/MWh
Carbon intensitygCO₂/kWh
Demand and generationGW
Demand 26.7avgGeneration 23.9avgTransfers 2.8avg
The day in figurespeaks, averages, totals
Peak demand31.5GW · 12:20
Low 20.1 · 04:40Avg 26.70–40 GW
Made in Great Britain89%of demand
Generation 23.9Transfers 2.8 GW
Net imports68GWh
In
72 Out
4
Zero-carbon share36%of generation
Nuclear 20%Hydro 1%Wind 9%Solar 7%

Transfers · Sat 18 Sept

Interconnectors and storage

On Saturday 18 September 2021, Great Britain imported 72 GWh and exported 4 GWh through its interconnectors. The most came from France (25 GWh), and the most exports went to Ireland (4 GWh).

All interconnectors

Sat 18 Sept
Imported
72GWh
Exported
4GWh
Net in
68GWh
Average net flow
2.82GW in

Into Great BritainOut of Great Britain

Belgium

Nemo Link

Average0.97GWImporting

In 23.3 GWhOut 0.0 GWh

Denmark

Viking Link

Average0.00GWIdle

In 0.0 GWhOut 0.0 GWh

France

IFA · IFA2 · ElecLink

Average1.03GWImporting

In 24.8 GWhOut 0.0 GWh

Ireland

Moyle · East–West · Greenlink

Average0.14GWExporting

In 0.7 GWhOut 4.2 GWh

Netherlands

BritNed

Average0.96GWImporting

In 23.1 GWhOut 0.0 GWh

Norway

North Sea Link

Average0.00GWIdle

In 0.0 GWhOut 0.1 GWh

Pumped storage

Dinorwig · Cruachan · Ffestiniog · Foyers

Average0.01GWPumping

Generated 4.4 GWhPumped 4.7 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.