Electricity Live

Great Britain’s electricity on Monday 20 September 2021

On Monday 20 September, demand averaged 29.4 GW. Renewables supplied 19%.

29.4GW AVERAGEWind3.56 GW12%Hydro0.14 GW0%Biomass1.65 GW6%Solar1.86 GW6%Gas14.24 GW48%Coal0.84 GW3%Imports2.73 GW9%Nuclear4.82 GW16%29.4GW AVERAGE12%48%9%16%
Price
£143.47/MWh
Day average £143.47
Demand29.4GW
Generation 27.1Transfers 2.3
Fossil fuels48%
Renewables19%
Other31%
Carbon intensityHigh
241g/kWh
0Day average 241300
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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 20 September 2021, gas supplied 48% of Great Britain’s electricity and nuclear 16%. Demand peaked at 35.7 GW at 12:30. Carbon intensity averaged 241 g/kWh and the price £143.47/MWh. Wind generation peaked at 5.5 GW at 16:05. Solar generation peaked at 6.5 GW at 13:00. Carbon intensity was lowest at 14:30 (204 g/kWh) and highest at 06:30 (284 g/kWh). The wholesale price ranged from £96.02/MWh at 03:30 to £241.07/MWh at 19:30. Gas made 53% 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 1.866.2%Wind 3.5611.9%Gas 14.2447.7%Hydro 0.140.5%Biomass 1.655.5%Nuclear 4.8216.1%Coal 0.842.8%
Price£/MWh
Carbon intensitygCO₂/kWh
Demand and generationGW
Demand 29.4avgGeneration 27.1avgTransfers 2.3avg
The day in figurespeaks, averages, totals
Peak demand35.7GW · 12:30
Low 19.6 · 04:00Avg 29.40–40 GW
Made in Great Britain92%of demand
Generation 27.1Transfers 2.3 GW
Net imports54GWh
In
60 Out
6
Zero-carbon share38%of generation
Nuclear 18%Hydro 1%Wind 13%Solar 7%

Transfers · Mon 20 Sept

Interconnectors and storage

On Monday 20 September 2021, Great Britain imported 60 GWh and exported 6 GWh through its interconnectors. The most came from Netherlands (20 GWh), and the most exports went to Ireland (6 GWh).

All interconnectors

Mon 20 Sept
Imported
60GWh
Exported
6GWh
Net in
54GWh
Average net flow
2.27GW in

Into Great BritainOut of Great Britain

Belgium

Nemo Link

Average0.83GWImporting

In 20.0 GWhOut 0.0 GWh

Denmark

Viking Link

Average0.00GWIdle

In 0.0 GWhOut 0.0 GWh

France

IFA · IFA2 · ElecLink

Average0.83GWImporting

In 19.8 GWhOut 0.0 GWh

Ireland

Moyle · East–West · Greenlink

Average0.23GWExporting

In 0.1 GWhOut 5.6 GWh

Netherlands

BritNed

Average0.85GWImporting

In 20.4 GWhOut 0.1 GWh

Norway

North Sea Link

Average0.00GWIdle

In 0.0 GWhOut 0.0 GWh

Pumped storage

Dinorwig · Cruachan · Ffestiniog · Foyers

Average0.04GWGenerating

Generated 5.2 GWhPumped 4.2 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.