Ballybay Wind Farm, near Tullaroan, will feature six Enercon turbines generating 13.8MW of electricity, which will meet the demand of about 9,300 homes.
Foyle Wind Farm will have four Enercon turbines generating 9.6MW, Gaelectric said, and will meet the demand of about 6,500 homes.
Operational in 2017
Both wind farms are expected to become operational during the second quarter of 2017.
Ballybay was acquired by Gaelectric in 2015, while Foyle is being managed by Gaelectric on behalf of Art Generation Ltd. Both wind farms, together with Cnoc Wind Farm near Grange in Co Tipperary, comprise the Blanchfield Cluster that feeds into a 34MW underground grid connection located near Thurles, Co Tipperary.