A new 260km electricity interconnector linking Republic of Ireland and Britain has opened in Co. Meath.
The East-West interconnector has the capacity to transport 500 megawatts of energy, enough to power 300,000 homes.
It is expected the development will mean cheaper energy for consumers.
The €600m project, developed by Eir Grid, has come in on time and under budget and will allow for the sale of electricity between the Republic of Ireland and Britain for the first time.
The undersea and underground cable runs between Deeside in north Wales and Woodland, Co Meath.
The link will open up the energy market and, in theory, lead to cheaper prices for the consumer.
Speaking at the switching on of the interconnector, the Minister for Communications, Energy and Natural Resources Pat Rabbitte said the development shows the benefit of Ireland working within a European context.
“The entire thrust behind the integration of European markets, of which this is a leading example, is to produce more competitive energy.
“Britain and Ireland are very happy to be at the forefront of delivering this project efficiently.”
The interconnector will be up and running on a commercial level from the beginning of next month.