Mid-year review - Ireland's energy and related emissions
The mid-year review compares data on electricity generated, oil delivered, and gas supplied into the Irish market in the first six months of 2025 to what has been observed in previous years.
The availability of timely and trusted data on Ireland's energy has never been more important. Policy updates and targets are operating on increasingly shorter timescales to drive faster annual emission reductions and guide us toward net-zero emissions by 2050.
This note supports timely and informed discussions on these energy policies and targets, by accelerating the pace at which key data and insights on Ireland's energy and related greenhouse gas emissions are published by SEAI. This note leverages the provisional monthly data collected to satisfy Ireland's international reporting obligations to the EU, to make early in-year estimates on key areas of energy supply and emissions.
Key points of interest
Comparing monthly electricity data for the first six months of 2025 with data from the same period in 2024:
- SEAI estimates that emissions from the electricity sector in the first half of 2025 were effectively unchanged.
- The contribution of renewable generation towards Ireland’s overall utility-scale supply (i.e. generation plus net imports) decreased from 42.0% to 40.8%.
- Electricity from wind farms was up 0.1%.
- Electricity from solar farms was up 72% and accounted for 4.1% of utility-scale generation.
- Overall utility-scale supply of electricity was 2.8% (0.47 TWh) higher than in the same period last year, which is a good proxy for increased electricity demand.
- Utility-scale generation in Ireland fell by 0.5%.
- Electricity net imports were up 21.9% on the same period last year.
- In the first six months of 2025 net imports accounted for 17.1% of Ireland's utility scale electricity supply.
- Net imports were the third-largest source of electricity in Ireland, after electricity generation from natural gas and from wind.
Comparing monthly oil delivery data for the first six months of 2025 with data from the same period in 2024:
- SEAI estimates that emissions from the transport sector in the first six months of 2025 were 5.7 MtCO2eq, down 2.0% on the same period in 2024.
- Demand for blended road diesel in the first half of 2025 was down 3.2%.
- Demand for blended road petrol in the first half of 2025 was up 4.0%.
- Biodiesel accounted for 8.5% of blended road diesel.
- Bioethanol accounted for 6.5% of blended road petrol.
- Deliveries of jet kerosene in the first half of 2025 were up 5.0% on the same period last year.
- Deliveries of heating kerosene in the first half of 2025 were down 0.9%, with practically all heating kerosene consumed in the residential sector.
Comparing monthly gas supply data for the first six months of 2025 with data from the same period in 2024:
- Total gas supply was down 2.4%.
- Gas for electricity generation in was down 0.2%.
- Gas for residential (heating) use was down 9.1%.
- Gas for the industry and services sectors was down 3.6%.
- Ireland's Indigenous production from the Corrib gas field was down 14.9%.
- Imported gas supply in the first half of 2024 was up 0.8%.
- Imported gas accounted for 82.0% of Ireland's total gas supply.
The above estimates of sectoral emissions from electricity and transport for the first six months of 2025 are based on the latest data currently available on electricity generated and inland deliveries of oil. Definitive sectoral data on the quantities of fuels combusted and resultant emission in 2025 will be available in 2026, provided in SEAI's 2025 National Energy Balance and the EPA's Greenhouse Gas Emissions 1990-2025 Report, respectively.