Battery energy storage facilities planned at Scottish Water Renfrewshire sites

Battery energy storage systems support by balancing supply and demand

A renewable energy developer plans to build three battery energy storage systems at three Scottish Water sites in Renfrewshire.

Battery energy storage systems would play an important role in balancing supply and demand and provide niche services to support the operation of the power grid.

Bluestone Energy has submitted three proposals to the Scottish Government for battery energy storage systems at Scottish Water’s Laighpark Wastewater Treatment Plant (WWTW), Stanely Water Treatment Plant (WTW) and Station Linwood Wastewater Pumping Station (WWPS).



Authorization requests will be submitted later in the year after consultation with local stakeholders.

Upon successful determination, battery energy storage systems would provide the flexibility and security of supply of the electrical system, which is vital alongside the increased deployment of renewable energy assets.

Battery energy storage systems support by balancing local and national power grids by charging to store excess generated electricity when demand is low and discharging to release stored electricity when demand is high.

This is particularly important in the context of decarbonizing the electricity system as we move away from using coal and gas generation, while increasing intermittent renewable generation, such as wind and solar PV.



This requirement will become even stronger as the decarbonisation of heating and transport by heat pumps and electric vehicles. Battery energy storage systems can also provide niche services, due to their fast response time, to support day-to-day power grid operations.

Each project will include 20 units of battery energy storage system providing a combined capacity of 69 MW, a control room to enable operation and maintenance of the system and associated electrical infrastructure to facilitate a connection to the local electrical grid. .

Each project will connect directly to Scottish power grid substations and will be facilitated by Scottish Water Horizons, the utility’s commercial arm.

Andy MacPherson, Managing Director of Bluestone Energy, said: “The rapid deployment of flexible assets such as battery energy storage is essential in Scotland to deliver net zero by 2045.



“Battery energy storage systems could provide low-cost green electricity to consumers and minimize our demand for imported electricity and gas.”

Donald MacBrayne, Scottish Water Horizons Business Development Manager, said: “We are delighted to be able to work with Bluestone Energy on these exciting projects facilitating our three sites in Renfrewshire. These projects align with Scottish Water’s ambitions to be net zero by 2040 and go beyond by working in partnership with others to also reduce their emissions. By taking this approach, we can all make a meaningful contribution to Scotland’s net zero goals.

“These three sites were chosen to house the battery energy storage systems due to suitable land and proximity to Scottish Power Electricity Networks substations with available connection point and grid capacity.

“Although the projects are on Scottish Water land, the battery energy storage systems do not supply electricity directly to Scottish Water. However, Scottish Water has entered into a ground lease agreement to host the projects, with revenue collected being reinvested in renewable projects for the benefit of customers.



Bluestone Energy is developing a total of six battery energy storage systems at Scottish Water sites, including Laighpark WWTW, Stanely Water WTW and Linwood WWPS, which have a combined capacity of 403MW. These projects are part of a joint development agreement with Macquarie Asset Management’s Green Investment Group to develop over 2GW of battery energy storage capacity across the UK.