Electricity Live

Great Britain’s electricity on Wednesday 15 September 2021

On Wednesday 15 September, demand averaged 29.8 GW. Renewables supplied 13%.

29.8GW AVERAGEWind2.10 GW7%Hydro0.16 GW1%Biomass1.51 GW5%Solar1.71 GW6%Gas15.94 GW52%Coal1.03 GW3%Imports3.07 GW10%Nuclear4.85 GW16%29.8GW AVERAGE52%10%16%
Price
£272.84/MWh
Day average £272.84
Demand29.8GW
Generation 27.3Transfers 2.5
Fossil fuels52%
Renewables13%
Other31%
Carbon intensityHigh
266g/kWh
0Day average 266300
Save as image
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 15 September 2021, gas supplied 52% of Great Britain’s electricity and nuclear 16%. Demand peaked at 36.3 GW at 12:30. Carbon intensity averaged 266 g/kWh and the price £272.84/MWh. Wind generation peaked at 2.8 GW at 05:00. Solar generation peaked at 6.4 GW at 12:30. Carbon intensity was lowest at 13:30 (232 g/kWh) and highest at 21:00 (302 g/kWh). The wholesale price ranged from £117.50/MWh at 02:30 to £643.29/MWh at 19:00. Gas made 58% 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 1.715.6%Wind 2.106.9%Gas 15.9452.5%Hydro 0.160.5%Biomass 1.515.0%Nuclear 4.8516.0%Coal 1.033.4%
Price£/MWh
Carbon intensitygCO₂/kWh
Demand and generationGW
Demand 29.8avgGeneration 27.3avgTransfers 2.5avg
The day in figurespeaks, averages, totals
Peak demand36.3GW · 12:30
Low 21.2 · 02:55Avg 29.80–40 GW
Made in Great Britain92%of demand
Generation 27.3Transfers 2.5 GW
Net imports64GWh
In
68 Out
4
Zero-carbon share32%of generation
Nuclear 18%Hydro 1%Wind 8%Solar 6%

Transfers · Wed 15 Sept

Interconnectors and storage

On Wednesday 15 September 2021, Great Britain imported 68 GWh and exported 4 GWh through its interconnectors. The most came from Belgium (21 GWh), and the most exports went to Ireland (3 GWh).

All interconnectors

Wed 15 Sept
Imported
68GWh
Exported
4GWh
Net in
64GWh
Average net flow
2.66GW in

Into Great BritainOut of Great Britain

Belgium

Nemo Link

Average0.87GWImporting

In 21.4 GWhOut 0.5 GWh

Denmark

Viking Link

Average0.00GWIdle

In 0.0 GWhOut 0.0 GWh

France

IFA · IFA2 · ElecLink

Average0.85GWImporting

In 20.6 GWhOut 0.1 GWh

Ireland

Moyle · East–West · Greenlink

Average0.10GWExporting

In 0.2 GWhOut 2.6 GWh

Netherlands

BritNed

Average0.78GWImporting

In 19.2 GWhOut 0.5 GWh

Norway

North Sea Link

Average0.26GWImporting

In 6.3 GWhOut 0.0 GWh

Pumped storage

Dinorwig · Cruachan · Ffestiniog · Foyers

Average0.18GWPumping

Generated 6.0 GWhPumped 10.3 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.