RWE is to build its largest UK storage project. The Pembroke Battery Storage facility will be a £200m development and form a major part of the Pembroke Net Zero Centre decarbonisation hub in South Wales.

The RWE Pembroke Battery project received planning consent in January this year and was also successful in the UK’s latest Capacity Market auction, securing a critical route to market. Construction will start in the first half of 2026, with commissioning and operations expected in the second half 2028, subject to receiving an updated and timely grid connection.

The storage system would be located on a 5.1-hectare area to the south of RWE’s Pembroke Power Station and comprises of 212 lithium-ion battery containers. Once constructed and fully operational, the battery could continually discharge up to 350MW of electricity directly into the Grid for two hours.

To operate the plant in harmony with the local ecosystem, part of the Pembroke Battery project will involve implementing biodiversity measures in the areas surrounding the operational power station site including meadow planting, native woodland and scrub planting, and developing a new large pond to support local wildlife.

RWE is currently involved in over 3GW of energy projects across 12 sites, of which around 1GW is renewable. The existing renewable energy portfolio already generates around a quarter of Wales’ renewable energy production. As part of its growth strategy, RWE plans to significantly increase its worldwide battery storage capacity.

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