Site Acceptance Test for MFE110 electrolyser

The information communicated within this announcement is deemed to constitute inside information as stipulated under the Market Abuse Regulations (EU) No. 596/2014 which is part of UK law by virtue of the European Union (withdrawal) Act 2018. Upon the publication of this announcement, this inside information is now considered to be in the public domain.

7 May 2025

Clean Power Hydrogen plc

("CPH2", the "Company" or the "Group")

Successful Completion of Site Acceptance Test for MFE110 electrolyser

'MFE electrolyser working at scale on a customer site for the first time'

CPH2, the UK-based green hydrogen technology and manufacturing company that has developed the IP-protected Membrane-Free Electrolyser ("MFE"), is pleased to announce that Level 3 of the Site Acceptance Test ("SAT") for its MFE110 electrolyser at Northern Ireland Water's ("NIW") site in Belfast has been successfully completed.

Highlights

· A pivotal milestone for CPH2 in commercialising its technology, with the MFE technology working at scale on a customer site for the first time, producing high purity hydrogen and oxygen in a commercial environment.

· Final stage of the SAT completed and independently witnessed by Lagan MEICA Limited ("Lagan"), the principal contractor, and ARUP, representing NIW.

· SAT demonstrated the MFE110 producing high purity hydrogen of 99.999mol% over prolonged period and 99.7wt% oxygen. Hydrogen generated is at fuel cell grade purity (ISO 14687)

· Signifies Northern Ireland's first production of pure hydrogen and oxygen generated reliably by an electrolyser at scale, a key market for CPH2.

· The milestone will help to unlock significant opportunities for NIW's decarbonisation efforts, as well as highlight the transformative potential of high purity oxygen across the wider wastewater treatment industry.

· Significant achievement in the safety case, demonstrating compliance with health and safety requirements for deploying an electrolyser within a public utility.

The final stage of the SAT for the MFE110 involved successfully verifying the safe and fully automated startup, operation, performance, and shutdown of the unit to the pre-determined specification at NIW site. The test was undertaken by Lagan, the contractor to NIW, and was overseen by engineering design specialists, Arup. SAT Level 3 followed successful pre-commissioning checks (Level 1) and functional tests (Level 2) at NIW's site. The MFE110 will play an important role in NIW's efforts to decarbonise its operations and explore transformational potential high purity oxygen in wastewater treatment.

The SAT of the MFE110 has demonstrated positive operational data with high purity of hydrogen at 99.999mol% over a prolonged period. The results provide confidence in the engineering capabilities of CPH2's technology and place the Group in a strong position as it advances the final design and build of the MFE220.

The successful test is a significant milestone for CPH2 and paves the way toward full commercialisation. It marks the first time CPH2's scaled MFE technology has been fully operational and functioning at a customer's site, providing further validation that MFE technology works at scale as the company progresses with the build of the first flagship MFE220 1MW system.

Strategic context of the MFE110 SAT

The success of the MFE110, culminating in the recent SAT, has provided valuable insights for developing CPH2's flagship MFE220, a 1MW system. Work is already underway on the final design and build, with Factory Acceptance Testing of the first MFE220 unit expected in H2 2025.

The Company has now entered its Commerciality Phase, focusing on key near-term milestones - delivering MFE220 units for its existing customer contracts, activating and supporting licensees, growing the commercial pipeline and continued technology and product improvement.

Jon Duffy, CEO of CPH2 commented:

"We are delighted that the MFE110 has successfully completed the final SAT level and that we now have a fully-fledged operational unit in the field. Our customer producing hydrogen and oxygen at its site using our scaled MFE technology is a significant milestone and proves that our technology is a current solution to green hydrogen production.

It is a strong start to our next phase of commercialisation, with the team now laser-focused on advancing the MFE220. We appreciate the guidance and support from Lagan MEICA Ltd and are incredibly grateful to our customer Northern Ireland Water, recipient of the Company's first MFE110, for their unwavering support and patience."

Alistair Jinks, Director of Business Services at Northern Ireland Water, commented:

"I am extremely pleased to have reached the successful conclusion of the SAT at our site in Belfast as we sit proudly with the first operational scaled MFE electrolyser in the country. While we have always taken pride in having a pioneering approach to sustainable water management, to have our vision become a reality is a special moment as we contribute to the hydrogen economy in Northern Ireland. We look forward to continuing our relationship with CPH2 and continuing to push the boundaries of the transformative potential of hydrogen and oxygen in wastewater treatment."

ENDS

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To find out more, please visit: https://www.cph2.com

Overview of CPH2

CPH2 is the holding company of Clean Power Hydrogen Group Limited which has almost a decade of dedicated research and product development experience. This experience has resulted in the creation of simple, safe and sustainable technology which is designed to deliver a modular solution to the hydrogen production market in a cost-effective, scalable, reliable and long-lasting manner. The Group's strategic objective is to deliver the lowest LCOH in the market in relation to the production of green hydrogen. CPH2 is listed on the AIM market and trades under the ticker LON:CPH2.