ITM Power has secured a combined £86.5 million in UK government support to expand domestic electrolyser manufacturing capacity. The funding package, announced in early April, includes a £40 million equity investment from Great British Energy and a £46.5 million grant from the Department for Energy Security and Net Zero (DESNZ), subject to subsidy review.
The investment will enable ITM Power to establish a 1 GW automated production line for its next‑generation Chronos electrolyser stacks at its existing Sheffield site. The programme forms part of a wider £120 million manufacturing expansion planned over the next three years, with commercial operations targeted by 2028.
Through the deal, Great British Energy will acquire a 10.4% stake in ITM Power.
The capital injection builds on the government’s push to strengthen domestic supply chains for clean energy technologies, reduce import dependence, and accelerate industrial decarbonisation.
Founded in 2000, the Sheffield‑based firm is one of the UK’s most established proton exchange membrane (PEM) electrolyser manufacturers, with around 500 MW of operational projects and more than 550 MW in backlog. Its Chronos stack, under development for two years, aims to deliver higher efficiency and lower unit costs compared with the company’s current Trident platform, which will continue serving existing customers.
The investment underscores growing confidence in hydrogen manufacturing as a cornerstone of Britain’s clean energy industrial strategy, positioning ITM among the few firms poised to scale homegrown electrolyser technology for export and domestic deployment.
