Councillors in Cavan and Monaghan will hear about plans to go ahead with the North-South Interconnector today.
Chief Executive of Eirgrid Mark Foley will address both Monaghan and Cavan County Councils.
The proposed interconnector would see 401 pylons erected across a 138km line between Meath, Cavan, Monaghan, Armagh and Tyrone.
The project is ready to move to the construction phase after a new review published in March backed a 2018 decision that the electricity connector could be built above ground.
The Department of the Environment said it expected the project to be completed by 2026.
However, the proposed plan faces long-standing opposition among local people and landowners in the affected counties.
The presentation by Mr Foley to the councils will be their first meeting since the publication of the review in March.
The Department said that the infrastructure will more than double the amount of power transferring between north and south and will boost the security of supply.
It will also enable a high level of renewable energy to be accommodated on the national grid.
The latest review concluded that the interconnector cannot be put underground because it would not be as reliable and stable as it would need to be.
The project has received planning permission in both jurisdictions and will now move to construction.
National grid operator Eirgrid has previously said the project is critical for the security of electricity supply across the island of Ireland and that there will be full engagement with landowners, local communities and stakeholders along the route.
