Siemens to support UK membrane-free electrolyser scale-up

German technology major Siemens will support UK membrane-free electrolyser firm Clean Power Hydrogen (CPH2) in commercialising its hydrogen production technology

Under a new memorandum of understanding (MOU), Siemens will contribute to the manufacturing and development of CPH2’s MFE technology.

Details of the company’s exact involvement remain unclear. However, CPH2 said its support will focus on product and process development, customer introductions, and go-to-market strategies.

Siemens provides control technology and automation facilities for hydrogen production projects, as well as digital twin tools for design and building projects. In 2024, it provided support for developing HiiROC’s thermal plasma methane-splitting technology.

CPH2 said it hopes to finalise the MOU into a legally binding partnership agreement.

Having completed its first site acceptance test of its pilot 0.5MW MFE110 system for Northern Ireland Water, CPH2 is focusing on delivering its first commercial 1MW units to customers in 2026.

Membrane-less electrolysers operate using fluid dynamics or buoyancy to separate hydrogen and oxygen. While this is cost-effective and simple, it means oxygen and hydrogen gases can mix, creating concerns around purity and safety.

In July 2025, CPH signed a non-binding agreement to supply an initial five 1MW units to a project in County Mayo, Ireland, for operation by 2027 or 2028.

Despite the potential cost savings and flexibility of membrane-less electrolysis, it is easier for the oxygen and hydrogen gases to mix, which creates concerns around purity and safety.

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