The Application will replace the previous consented (but unbuilt) BESS facility granted under planning ref (25/60108).

Application details

Planning reference

2660480

Council

Mayo County Council

Proposal description

The Application will replace the previous consented (but unbuilt) BESS facility granted under planning ref (25/60108). The development will consist of the following elements: • BESS facility including battery containers with integrated HVAC (heating, Ventilation, Air Conditioning) units, transformers, inverters, underground cabling, internal access roads, lighting, CCTV and perimeter fencing; • Associated Electrical Compound consisting of a Low Voltage Operations Independent Power Producer (IPP) Compound including a single storey control and operations building, switchgear room, storage container, car parking, welfare/office facilities; • High voltage electrical yard and Eirgrid 110kV substation building; • 264 meters long 110kV single circuit underground grid connection (UGC) within SSE lands and 119 meters within the existing ESB 110kV Substation lands to facilitate the grid connection to the existing adjacent Tawnaghmore substation; • Proposed internal access tracks to BESS facility, including 4 no. new gate entrances • Reinforced concrete and retaining walls; • A temporary construction compound and associated temporary infrastructure to facilitate the development; • Associated landscaping, drainage, decommissioning of existing septic tank and ancillary works. A 10-year permission is sought in respect of the development. Certain details of the proposed development are unconfirmed in the planning application, and an opinion on unconfirmed details accompanies the application. The Tawnaghmore Power Station has an Environmental Protection Agency (EPA) issued Industrial Emissions (IE) Licence (Reg, No. P0566-02).

Location / address

SSE Thermal Tawnaghmore Power Station, Tawnaghmore Upper, Killala Co. Mayo

Application type

PERMISSION

Received / registered

19 Jun 2026

Council decision

CONDITIONAL

Council decision date

11 Aug 2026