Electricity Live

Great Britain’s electricity on Wednesday 29 September 2021

On Wednesday 29 September, demand averaged 30.8 GW. Renewables supplied 44%.

30.8GW AVERAGEWind11.30 GW36%Hydro0.31 GW1%Biomass1.54 GW5%Solar1.99 GW6%Gas9.19 GW29%Imports1.85 GW6%Nuclear5.00 GW16%30.8GW AVERAGE36%29%16%
Price
£148.91/MWh
Day average £148.91
Demand30.8GW
Generation 29.3Transfers 1.4
Fossil fuels29%
Renewables44%
Other27%
Carbon intensityLow
126g/kWh
0Day average 126300
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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 Wednesday 29 September 2021, wind supplied 36% of Great Britain’s electricity and gas 29%. Demand peaked at 36.9 GW at 10:30. Carbon intensity averaged 126 g/kWh and the price £148.91/MWh. Wind generation peaked at 15.3 GW at 14:15. Solar generation peaked at 6.8 GW at 13:00. Carbon intensity was lowest at 14:30 (81 g/kWh) and highest at 21:00 (184 g/kWh). The wholesale price ranged from £114.43/MWh at 15:30 to £211.98/MWh at 19:00. Wind made 39% 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 1.996.4%Wind 11.3036.3%Gas 9.1929.5%Hydro 0.311.0%Biomass 1.544.9%Nuclear 5.0016.0%
Price£/MWh
Carbon intensitygCO₂/kWh
Demand and generationGW
Demand 30.8avgGeneration 29.3avgTransfers 1.4avg
The day in figurespeaks, averages, totals
Peak demand36.9GW · 10:30
Low 21.0 · 03:25Avg 30.80–40 GW
Made in Great Britain95%of demand
Generation 29.3Transfers 1.4 GW
Net imports34GWh
In
40 Out
6
Zero-carbon share63%of generation
Nuclear 17%Hydro 1%Wind 39%Solar 7%

Transfers · Wed 29 Sept

Interconnectors and storage

On Wednesday 29 September 2021, Great Britain imported 40 GWh and exported 6 GWh through its interconnectors. The most came from Belgium (20 GWh), and the most exports went to Ireland (6 GWh).

All interconnectors

Wed 29 Sept
Imported
40GWh
Exported
6GWh
Net in
34GWh
Average net flow
1.42GW in

Into Great BritainOut of Great Britain

Belgium

Nemo Link

Average0.84GWImporting

In 20.2 GWhOut 0.0 GWh

Denmark

Viking Link

Average0.00GWIdle

In 0.0 GWhOut 0.0 GWh

France

IFA · IFA2 · ElecLink

Average0.72GWImporting

In 17.3 GWhOut 0.0 GWh

Ireland

Moyle · East–West · Greenlink

Average0.14GWExporting

In 2.9 GWhOut 6.3 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

Average0.02GWGenerating

Generated 3.9 GWhPumped 3.3 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.