Electricity Live

Great Britain’s electricity on Tuesday 28 September 2021

On Tuesday 28 September, demand averaged 30.3 GW. Renewables supplied 38%.

30.3GW AVERAGEWind10.47 GW34%Hydro0.29 GW1%Biomass2.09 GW7%Solar0.88 GW3%Gas10.36 GW34%Imports1.64 GW5%Nuclear5.04 GW16%30.3GW AVERAGE34%34%16%
Price
£145.95/MWh
Day average £145.95
Demand30.3GW
Generation 29.1Transfers 1.2
Fossil fuels34%
Renewables38%
Other28%
Carbon intensityModerate
137g/kWh
0Day average 137300
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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 Tuesday 28 September 2021, wind supplied 34% of Great Britain’s electricity and gas 34%. Demand peaked at 36.9 GW at 19:05. Carbon intensity averaged 137 g/kWh and the price £145.95/MWh. Wind generation peaked at 12.7 GW at 12:30. Solar generation peaked at 4.0 GW at 11:30. Carbon intensity was lowest at 00:00 (66 g/kWh) and highest at 20:00 (194 g/kWh). The wholesale price ranged from £78.23/MWh at 00:30 to £227.68/MWh at 18:00. Wind made 36% of the electricity generated in Great Britain, compared with 25% across 2021.

Charts

Generation, demand, price and carbon

Generation by sourceGW · daily average below
Solar 0.882.9%Wind 10.4734.0%Gas 10.3633.7%Hydro 0.291.0%Biomass 2.096.8%Nuclear 5.0416.4%
Price£/MWh
Carbon intensitygCO₂/kWh
Demand and generationGW
Demand 30.3avgGeneration 29.1avgTransfers 1.2avg
The day in figurespeaks, averages, totals
Peak demand36.9GW · 19:05
Low 20.4 · 03:55Avg 30.30–40 GW
Made in Great Britain96%of demand
Generation 29.1Transfers 1.2 GW
Net imports28GWh
In
32 Out
5
Zero-carbon share57%of generation
Nuclear 17%Hydro 1%Wind 36%Solar 3%

Transfers · Tue 28 Sept

Interconnectors and storage

On Tuesday 28 September 2021, Great Britain imported 32 GWh and exported 5 GWh through its interconnectors. The most came from Belgium (16 GWh), and the most exports went to Ireland (3 GWh).

All interconnectors

Tue 28 Sept
Imported
32GWh
Exported
5GWh
Net in
28GWh
Average net flow
1.17GW in

Into Great BritainOut of Great Britain

Belgium

Nemo Link

Average0.65GWImporting

In 16.3 GWhOut 0.7 GWh

Denmark

Viking Link

Average0.00GWIdle

In 0.0 GWhOut 0.0 GWh

France

IFA · IFA2 · ElecLink

Average0.61GWImporting

In 15.5 GWhOut 0.8 GWh

Ireland

Moyle · East–West · Greenlink

Average0.10GWExporting

In 0.7 GWhOut 3.0 GWh

Netherlands

BritNed

Average0.00GWIdle

In 0.0 GWhOut 0.0 GWh

Norway

North Sea Link

Average0.00GWIdle

In 0.0 GWhOut 0.0 GWh

Pumped storage

Dinorwig · Cruachan · Ffestiniog · Foyers

Average0.05GWGenerating

Generated 6.8 GWhPumped 5.6 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.