Ampeak Energy Limited (AMP) has announced a major milestone at its Afon Wysg 1 (AW1) battery storage project at Uskmouth Sustainable Energy Park, confirming the successful delivery of all batteries and key components to site. The 240MWh project is on track for first energisation later in November 2026, with full commercial operation targeted for Q1 2027. Investors will note that expansion plans to 480MWh are already advancing, with financial close intended shortly after the initial project enters commercial operation.

Key Points

  • Ampeak Energy Limited (AMP) — developer, owner and operator of sustainable energy projects, including the Uskmouth Sustainable Energy Park
  • All 55 batteries and key components for the 240MWh AW1 project have been successfully delivered and installed at Uskmouth
  • First energisation targeted for November 2026; full commercial operation targeted for Q1 2027; expansion to 480MWh planned for financial close shortly after
  • Investors should watch for confirmation of first grid energisation and financial close of the 480MWh expansion phase

All 55 e-STORAGE Batteries and 36 Inverters Installed at Uskmouth AW1 Site

The 55 batteries for the AW1 project were supplied by e-STORAGE, a subsidiary of Canadian Solar, which will also oversee commissioning. Principal contractor Jones Bros Civil Engineering UK installed the batteries alongside 36 inverters, 18 twin skids, and a main grid transformer. The company states that components were delivered over 22 days, with the logistics carefully coordinated between Jones Bros, e-STORAGE, and the wider supply chain. Construction of a new on-site substation has been completed, and high-voltage cabling for connection to the national grid infrastructure has been installed, with approximately two thirds of the existing power station export cable reused to reduce both time and cost.

Uskmouth Foundations Already Poured for 480MWh Expansion as AW1 Targets Energisation

Ampeak has taken a forward-looking approach to its site layout, strategically leaving space between batteries and pouring concrete foundations ahead of the planned expansion to 480MWh. The announcement states that this preparation will allow the expansion to be implemented with minimal disruption to the operational 240MWh asset. The company intends to reach financial close for the expansion shortly after the initial project enters full commercial operation in Q1 2027. This design decision reduces future groundwork requirements, a point confirmed by e-STORAGE Managing Director EMEA Matt Paterson in the announcement.

Sustainable Construction Methods Adopted Across the Uskmouth Energy Park Development

The announcement highlights several environmentally conscious construction practices at Uskmouth. Bulk aggregates were imported via rail to minimise heavy goods vehicle movements on local roads, while concrete from previous demolition work on the former power station was crushed and repurposed on site. An attenuation pond has been created as part of an ecological enhancement plan, with new fencing and landscaping carried out to improve biodiversity. Jones Bros also recruited locally, with the site foreman and five operatives based near Uskmouth, alongside a higher degree apprentice joining the delivery team during the component installation phase.

AW1 Positions Ampeak Alongside MeyGen as a Dual-Asset Sustainable Energy Developer

Uskmouth is a former power station site being repurposed into what the company describes as one of the UK's largest battery energy storage sites. Ampeak Energy also owns MeyGen, described in the announcement as the world's flagship tidal stream project, giving the company a dual-asset profile across two distinct clean energy technologies. The AW1 project represents the first operational phase of the Uskmouth Sustainable Energy Park, and successful energisation would mark a significant commercial step for the company as it pursues its stated strategy of building a sustainable energy portfolio through to 2035.