Ireland and France have marked the beginning of construction work on the Celtic Interconnector project.

The Minister for the Environment, Climate and Communications, Eamon Ryan and

French Energy Minister, Agnès Pannier-Runacher acknowledged the commencement of works at the EirGrid offices in Dublin, after a visit by Minister Pannier-Runacher to Ireland.

The Celtic Interconnector is a high-voltage power cable that will link the electricity grids of Ireland and France, with enough capacity to power 450,000 homes.

EirGrid, the state-owned transmission system operator (TSO), is working with its French equivalent, Réseau de Transport d’Electricité (RTE), to deliver the 700-megawatt submarine cable, with connection points between the southern coast of Ireland and the northwest coast of France.

The Celtic Interconnector will also be part of the Offshore Network Development Plan and is intended to develop an integrated energy system for European energy markets.

The European Commission is contributing €530.7 million from the commission's Connecting Europe Facility (CEF) to help complete the design and delivery of the project.

Ireland and France have also signed a Joint Declaration of Intent on 'Energy Transition Cooperation'. The declaration provides a framework for both countries to accelerate the decarbonisation of energy systems and is part of a wider collective ambition for Europe to become the first climate neutral continent by 2050. The Joint Declaration of Intent also builds upon existing commitments set out in the 'Ireland France Joint Plan of Action 2021-2025', adopted by both countries in August 2021.

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Minister Ryan said: "I warmly welcome Minister Agnès Pannier-Runacher, along with her French colleagues to Dublin today, as we continue to strengthen our relationship with our nearest EU neighbour. Their visit, along with the signing of this Joint Declaration of Intent on Energy Transition Cooperation, symbolises our mutual desire to take our relations to another level. What we have set out in this declaration makes clear that both Ireland and France will be central to wider European energy plans.

"The commencement of construction on the Celtic Interconnector project marks an important part of our wider energy ambitions. Increased electricity interconnection will be a key enabler in our growing use of renewable energy will also help lower energy prices and play a central role in Ireland’s journey to a net zero power system. It will also better integrate European electricity markets, and by using more diversified energy markets, this will improve our electricity security and resilience."

French Energy Minister, Agnès Pannier-Runacher, said: "I am very happy and honoured to visit Ireland today. This visit will enable the development of the very close and friendly relations between France and Ireland on energy and climate change. The joint declaration on energy I will sign with my Irish colleague Eamon Ryan will deepen the working relations between our two ministries. I will also be thrilled to inaugurate the Celtic Interconnector, which will increase the security of supply both for Ireland and France and contribute to the decarbonisation of our electricity mixes. This visit will enable us to prepare our future work together: this involves in particular our preparation of COP28, but also our joint co-chairing of the International Energy Agency ministerial in February 2024. Finally, I would like to thank the Irish technicians at ESB networks, who came to France recently to help repair the recent damages of the Ciaran storm."

The project is due to be finished in 2026 with integration to the grid expected by 2027.