Project Overview

The proposed 75 MW battery storage facility will allow energy from renewable sources, such as solar farms, to be stored during times of low consumer demand. This energy can later be released onto the electricity grid, when required.

Battery storage will play a vital role in reducing reliance on fossil fuels, increasing security of supply, lowering electricity costs by maximising our use of renewable energy and providing flexible capacity to meet growing demand on the grid.

Site selection 

The Fieldstown BESS project is designed to utilise existing electricity infrastructure by connecting into the electricity grid via the proposed Fieldstown 110 kV Substation, which was granted planning permission in early 2025.

Why is this project important?

Energy storage will play an important role in the transition to a greener and more secure energy future. Grid-scale battery energy storage systems, or BESS, help balance the intermittent supply of renewable energy sources with fluctuating consumer demand. By storing surplus renewable electricity generated during periods of low electricity demand, batteries provide a dependable backup energy source to relieve pressure on the grid during peak hours, while increasing grid reliability. Reducing our reliance on fossil fuels can also help drive down electricity prices.

Battery Storage FAQs

How does a grid-scale battery storage facility work? How long will the Fieldstown BESS project take to construct? What safety systems are built into the design of a battery storage unit?  We have compiled a list of FAQS for you to view and download here.

What are the next steps?

OCTOBER 2025 UPDATE: We are awaiting a planning appeal decision from An Coimisiún Pleanála.