SSE has secured agreements in Ireland’s latest capacity auction for the single electricity market.
SSE contracts in Ireland’s T-4 2028/29 auction
5,942MW of capacity agreements were awarded in Ireland’s T-4 2028/29 auction on Friday 20 December 2024. The agreements awarded auction participants a clearing price of €149,960/MW.
We have secured contracts for 547MW of de-rated electricity generation capacity* for the delivery year. (The delivery year runs from 30 September 2028 to 30 September 2029.)
Our Thermal business’s Great Island Power Station in Co. Wexford (345MW) and its smaller peaker plants at Rhode in Co. Offaly (88MW) and Tawnaghmore in Co. Mayo (89MW) were included in the award.
Finlay McCutcheon, Managing Director, SSE Thermal on Ireland’s T-4 2028/29 auction
“Our flexible generation assets in Ireland continue to play an important role in supporting security of supply and enabling a renewables-led system. These contracts will allow them to continue to do so towards the end of the decade, alongside potential new plants being developed by SSE at Tarbert and Platin which would run on sustainable biofuels.”
SSE Renewables also secured 11MW of onshore wind capacity. Our Renewables business also secured a 10-year capacity agreement for the proposed 100MW / 200MWh Derrymeen battery storage project in Co. Tyrone (14MW). The project secured an agreement at a clearing price of £150,000/MW. The project is targeting a final investment decision in 2025 for delivery by the end of 2026.
These provisional results are subject to approval by the Regulatory Authorities and are expected to be confirmed in January 2025.
What is Ireland’s T-4 capacity auction?
The T-4 capacity auction is key to the design of the all-island wholesale electricity market. It helps deliver a reliable electricity supply, at the lowest possible cost. The auction is known as a T-4 auction because it secures capacity four years in advance.
*All volumes include a de-rating factor applied in accordance with the rules set by the System Operators and approved by the Regulatory Authorities.