Project Summary

GRAHAM have completed a state-of-the-art battery energy storage system at Dunore Point Water Treatment Works (WTW), on behalf of long-standing client NI Water. Construction commenced in February 2023, to deliver NI Water's goals of reducing its carbon footprint after becoming one of the first public sector organisations to install a battery energy storage system. The 4.1 MW battery is powered by an existing solar farm at one of NI Water’s largest water treatment plants, Dunore Point, Antrim.

The detail

The battery boasts a 5.6 MWh (megawatt hour) total capacity which helps to store surplus energy generated onsite from c.24,000 solar panels. During periods of low customer demand, NI Water can store this renewable energy to use later during peak times. The company can therefore power its operations at a lower cost and keep water flowing.

The battery also has flexibility to provide power back to the grid when required, to help support grid stability and provide greater resilience in the network to benefit NI society and economy. By generating its own renewable power, NI Water will reduce its costs and generate income from this installation.