Electricity supplier fuel mix and CO2 per kWh

Northern Ireland suppliers, 2024

Year

Order

3T Power0 g CO2/kWh · 100.0% renewable
Budget Energy0 g CO2/kWh · 100.0% renewable
Flogas Enterprise Solutions0 g CO2/kWh · 100.0% renewable
SSE Airtricity0 g CO2/kWh · 100.0% renewable
Electric Ireland (all-island licences)137 g CO2/kWh · 67.0% renewable
Click Energy148 g CO2/kWh · 66.3% renewable
Electric Ireland161 g CO2/kWh · 54.6% renewable
GO Power205 g CO2/kWh · 53.4% renewable
Power NI256 g CO2/kWh · 41.7% renewable
All-island average (Single Electricity Market)163 g CO2/kWh · 62.4% renewable

Renewable
Gas
Coal
Oil
Peat
Other

Great Britain and the UK, 1 April 2025 to 31 March 2026

UK fuel mix (what the average supplier's electricity came from)

Renewables 48.0%, Gas 31.4%, Nuclear 13.7%, Coal 4.7%, Other 2.2%

Residual fuel mix (electricity no supplier claimed certificates for)

Renewables 10.8%, Gas 65.3%, Nuclear 7.1%, Coal 11.4%, Other 5.4%: about 396 g CO2 per kWh

Renewables
Gas
Nuclear
Coal
Other

What your supplier's figure means for you

Electricity used in a year (kWh)

Your supplier's CO2 figure (g per kWh)

It's on your bill or your supplier's fuel mix page.

Location-based (UK grid, 2026 government factor): 13.10 t
Market-based, with your supplier's figure: –
Market-based, with no supplier figure (residual mix): 39.60 t

Tonnes of CO2 (supplier and residual figures) or CO2e (grid factor) for Scope 2. Report the location-based figure always, and the market-based one too if you can.

Contains public sector information licensed under the Open Government Licence v3.0. Sources: Utility Regulator, Fuel Mix Disclosure and CO2 Emissions reports; DESNZ, Fuel mix disclosure data table and greenhouse gas reporting conversion factors.