Electricity Live

Great Britain’s electricity on Tuesday 20 May 2025

On Tuesday 20 May, demand averaged 27.8 GW. Renewables supplied 24%.

27.8GW AVERAGEWind2.62 GW9%Hydro0.17 GW1%Biomass2.87 GW10%Solar4.23 GW14%Gas9.57 GW32%Imports4.77 GW16%Nuclear5.28 GW18%27.8GW AVERAGE9%10%14%32%16%18%
Price
£82.96/MWh
Day average £82.96
Demand27.8GW
Generation 24.8Transfers 3.1
Fossil fuels32%
Renewables24%
Other44%
Carbon intensityModerate
158g/kWh
0Day average 158300
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 Tuesday 20 May 2025, gas supplied 32% of Great Britain’s electricity and nuclear 18%. Demand peaked at 33.8 GW at 09:30. Carbon intensity averaged 158 g/kWh and the price £82.96/MWh. Wind generation peaked at 3.1 GW at 00:00. Solar generation peaked at 12.9 GW at 12:30. Carbon intensity was lowest at 11:30 (90 g/kWh) and highest at 20:30 (211 g/kWh). The wholesale price ranged from £63.46/MWh at 12:30 to £111.08/MWh at 23:30. Gas made 39% of the electricity generated in Great Britain, compared with 32% across 2025.

Charts

Generation, demand, price and carbon

Generation by sourceGW · daily average below
Solar 4.2314.3%Wind 2.628.9%Gas 9.5732.4%Hydro 0.170.6%Biomass 2.879.7%Nuclear 5.2817.9%
Price£/MWh
Carbon intensitygCO₂/kWh
Demand and generationGW
Demand 27.8avgGeneration 24.8avgTransfers 3.1avg
The day in figurespeaks, averages, totals
Peak demand33.8GW · 09:30
Low 20.8 · 04:00Avg 27.80–40 GW
Made in Great Britain89%of demand
Generation 24.8Transfers 3.1 GW
Net imports72GWh
In
113 Out
40
Zero-carbon share50%of generation
Nuclear 21%Hydro 1%Wind 11%Solar 17%

Transfers · Tue 20 May

Interconnectors and storage

On Tuesday 20 May 2025, Great Britain imported 113 GWh and exported 40 GWh through its interconnectors. The most came from France (56 GWh), and the most exports went to Ireland (23 GWh).

All interconnectors

Tue 20 May
Imported
113GWh
Exported
40GWh
Net in
72GWh
Average net flow
3.01GW in

Into Great BritainOut of Great Britain

Belgium

Nemo Link

Average0.15GWImporting

In 11.1 GWhOut 7.6 GWh

Denmark

Viking Link

Average0.00GWIdle

In 0.0 GWhOut 0.0 GWh

France

IFA · IFA2 · ElecLink

Average2.35GWImporting

In 56.4 GWhOut 0.0 GWh

Ireland

Moyle · East–West · Greenlink

Average0.94GWExporting

In 0.0 GWhOut 22.6 GWh

Netherlands

BritNed

Average0.06GWImporting

In 11.5 GWhOut 10.0 GWh

Norway

North Sea Link

Average1.40GWImporting

In 33.5 GWhOut 0.0 GWh

Pumped storage

Dinorwig · Cruachan · Ffestiniog · Foyers

Average0.08GWGenerating

Generated 2.1 GWhPumped 0.2 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.