The project, the company’s first two-hour duration battery, plays a critical role in supporting grid stability by storing excess renewable energy and releasing it during peak demand.
The Hirwaun battery can deliver a peak output of 21.76 MW, enough to power over 48,000 homes for two hours. This added capacity helps the National Grid Electricity System Operator (NESO) manage energy supply and demand more effectively, reducing reliance on fossil fuels and enhancing energy security for local communities and businesses.
Repurposing legacy infrastructure
As the fifth of nine sites being converted from diesel generators to grid-scale battery storage, Hirwaun is part of Pulse Clean Energy’s strategy to transform legacy infrastructure into clean energy assets.
Trevor Wills, CEO of Pulse Clean Energy, commented: “The successful commissioning of our first two-hour battery project is a milestone for Pulse Clean Energy as we continue to advance our strategy to support the integration of renewable energy solutions into the UK’s grid. Battery storage is crucial to strengthening the resilience of the grid and enabling growth in renewable generation.
“The environmental impact of this project is far-reaching and will deliver significant benefits to the local communities in Aberdare and its surrounding areas, strengthening energy security, and establishing a cleaner, more sustainable future for Wales.”
Investment and partnerships
The project was financed through Pulse Clean Energy’s £175 million credit facility, backed by Santander, CIBC, Investec, and the National Wealth Fund, with equity from the Investment Management Corporation of Ontario (IMCO). Asset optimisation is being managed by Habitat, with additional support from Eversheds (legal), Everose (technical through PAC support), and Fichtner Consulting Engineers (design and engineering).
Image: National Grid