Germany-headquartered power firm RWE has made a final investment decision (FID) on a 350MW/700MWh battery energy storage system (BESS) in Wales.
Called Pembroke Battery Storage, it is part of the wider Pembroke Net Zero Centre project combining renewable generation including green hydrogen production.
The project received planning consent in January 2025 and also won contracts in the UK’s most recent capacity market (CM) auction. Construction will start in 2026 with commissioning and commercial operation in H2 2028, ‘subject to receiving an updated and timely grid connection’, RWE said. That probably alludes to the ongoing grid connection queue reshuffle.
The BESS, which RWE said is its largest in the UK, will be located on 5.1 hectares of land adjacent to Pembroke Power Station and will comprise 212 battery containers and 106 power conversion systems (PCS). As part of the planning process, RWE took a range of environmental and technical assessments to understand and mitigate any potential impacts of the development.
The Pembroke Net Zero Centre project that Pembroke Battery Storage is part of forms part of RWE’s intention to decarbonise current power station operations and invest in new technologies. So far, of RWE’s 3GW generation in Wales, over 12 sites, around 1GW is renewable energy, it said.
Almost a year ago, in December 2024, RWE secured planning consent for the Pembroke Green Hydrogen plant with a 100Mwe electrolyser due to be located on land adjacent to the Pembroke Power Station.
Part of this article first appeared here on our sister site, Energy Storage News.