Mullafarry Battery Storage Project
Mullafarry BESS is a proposed 80MW/160MWh Battery Energy Storage System (BESS) to be located in the townland of Tawnaghmore Upper, adjacent to SSE’s existing 104MW Tawnaghmore Power Station at Killala Business Park, North Mayo.
If consented and approved for delivery, it would be capable of powering over 75,000 Irish homes for up to two hours at a time*.
Mullafarry BESS project would be available to provide battery-stored energy for up to two hours during times of peak demand, helping power homes and businesses across Ireland.
It would also lead to increased local employment during construction and create supply chain opportunities, helping boost the local economy. Once operational, it would also support local investment in Mayo through commercial rates payments.
Final delivery of Mullafarry BESS is subject to the project receiving the necessary planning consent and a final investment decision by SSE. Subject to these approvals, it is hoped construction could commence in 2026 with project completion expected in 2028.
Potential capacity
Newsletter
Please click below to download the February 2025 edition of the Mullafarry Project newsletter.
Download the newsletterA short film : How does a Battery Energy Storage System (BESS) work?
Contact us
If you have any questions relating to the proposed Mullafarry BESS Project, please contact our Community Liaison Officer:
Email: [email protected]
* Quoted over 75,000 homes (77,171) supplied for 2 hours, based on an 80MW (160MWh) battery against assumed average daytime (08:00-20:00) hourly use of 1.03kWh at a typical home (based on Typical Domestic Annual Consumption, 4,200 kWh per household, Commission for the Regulation of Utilities)