BORD na Mona plans to erect 600 wind turbines in the midlands in what will be the biggest onshore windfarm in Europe.
The €5bn 'Clean Energy Hub' will include hundreds of turbines rising up to 100 metres into the air, and will be built across a 20,000-hectare site in east Offaly and west Kildare.
Enough power for one million homes will be produced, but all of it will be exported to the UK and on to Europe. Planning permission for the massive project will be sought in early 2015, with the first turbine to be erected within two years.
It is hoped to complete the windfarm in 2020.
Company chairman John Horgan said that neighbouring landowners would be invited to join the Clean Energy Hub, and that the development could result in up to 3,000 construction jobs, with 200 full-time positions once complete.
Revenues of up to €1bn a year could be generated if the project goes ahead.
"I am delighted to be announcing the launch of the Clean Energy Hub and to issue an invitation to all other partners to join with us in preparing a single planning application," Mr Hogan said.
"Wind farms are innovative and profitable ways of continuing our mandate to extract maximum economic and social value from the lands we hold in trust for the benefit of all people of Ireland."
The scheme was announced at the launch of the construction phase of the Bord na Mona Bruckana windfarm project on a site straddling Laois, Tipperary and Kilkenny.
Some 14 turbines will be erected, and the company also plans to erect 100 turbines on a farm it owns at Bellacorick in Mayo, which opened in 1992.
It also has two other projects in development, at Oweninny in Mayo and Mount Lucas in Offaly.
Speaking at the launch, Energy Minister Pat Rabbitte said his department was working with the UK government to put in place an agreement to allow electricity be exported to Britain by early next year.
"We have an exploitable, sustainable, indigenous natural resource here from which we can profit in terms of jobs and in terms of revenue streams," he said.
A spokesman for Bord na Mona said that it would have to secure a connection to the national grid before the power could be exported.