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Hundreds of dual-fuel vessels capable of running on clean fuels are currently on order or already entering service globally. Yet, despite fleet readiness, the vast majority continue to burn conventional marine diesel.

The industry is stuck in a waiting game. Vessel operators are ready to transition, but clean fuels cannot yet compete on price with fossil fuels. At the same time, ports and fuel suppliers cannot commit to large-scale infrastructure investments without guaranteed, cost-effective off-take.

Because hydrogen is the fundamental building block for all clean maritime fuels, whether direct hydrogen, e-methanol, or green ammonia, achieving cost parity at the electrolyser level is the single most urgent priority for shipping decarbonisation.

Solving the green hydrogen cost problem is how we will achieve fossil-fuel cost parity without long-term taxpayer drag.

Through homegrown UK technology, the GreenMar consortium is changing the unit economics of green hydrogen to break through this, protect industrial supply chains, and unlock a major global export market.

Removing the Technology Bottlenecks I GreenMar Blueprint

To bring green fuel costs to a point where they compete directly with existing fuels, the GreenMar consortium solves the core technical and environmental barriers that have historically held legacy electrolysers back.

Led by Supercritical Solutions alongside a dedicated group of UK partners, the blueprint tackles every link in the value chain through a unified technological architecture:

• Increasing efficiency and eliminating compression costs (Supercritical): Traditional electrolysers produce low-pressure gas, requiring heavy, power-hungry mechanical compressors to reach maritime storage pressures. Supercritical's ultra-efficient, membraneless technology natively outputs hydrogen at high pressure, stripping out massive CAPEX and energy losses.
• Protecting water resources (Waterwhelm): Electrolysis demands high-purity freshwater, creating severe water scarcity issues. Waterwhelm uses forward osmosis powered by waste heat to transform local wastewater effluent into high-purity electrolyser feedstock, requiring no new freshwater.
• Direct diesel displacement (PlusZero): High-pressure hydrogen is deployed by PlusZero into Hydrogen Internal Combustion Engines (HICE) at Forth Ports, delivering clean shore power and direct vessel refuelling to replace diesel immediately, both onshore and offshore.
• Pioneering adopter (Forth Ports): An organisation collaborating to explore emerging  technology, leading the way to develop capabilities to meet their net zero goals and sustain long-term business value.
• Planet-First Engineering: Legacy systems rely heavily on scarce precious metals like iridium and persistent "forever chemicals" (PFAS). The Supercritical architecture replaces fragile membranes and critical raw materials with a robust, all-metal stack design.
• Scaling UK Manufacturing (Manufacturing Technology Centre - MTC): The MTC provides advanced manufacturing expertise to scale stack production efficiently within the UK.
• Strategic Advisory & Investment Backing: The initiative is supported by strategic technical advisory and investment from supportive industrial backers.

By targeting a levelised cost of hydrogen (LCOH) of £4/kg, this collective effort establishes a viable alternative to fossil fuels in maritime that works within market realities.

An Engine for UK Jobs and Exports

Solving maritime decarbonisation is both an environmental necessity and an opportunity to insulate the UK economy from the fossil fuel price rollercoaster.

By anchoring technology, intellectual property, and supply chains in the UK, this approach creates high-skilled engineering jobs, revitalises port communities, and protects industrial clusters from wholesale energy spikes. As UK nameplate manufacturing scales toward 1GW, this homegrown solution offers an exportable platform to decarbonise global trade routes and drive economic growth.

LONDON - APRIL  1st, 2026 - Supercritical Solutions Ltd (Supercritical), a leading innovator in renewable hydrogen technology, officially opened its new Global Tech Centre (GTC) in London. The facility marks a milestone in the company’s rapid scaling, providing a dedicated hub for advanced testing, engineering and industrial collaboration as the global energy sector reaches a critical transition point.

The opening follows a year of significant growth for Supercritical which has seen its team expand from 15 to more than 40 experts. The GTC expansion complements the company’s ongoing technical milestones in Teesside, where its regional team continues to advance a dedicated industrial demonstration unit designed to prove the viability of its proprietary hydrogen production method at scale.

“Opening the doors of our Global Tech Centre showcases our commitment to solving the hardest engineering challenges in the hydrogen value chain,” said Matt Bird, CEO and Co-Founder at Supercritical. “As the future of hydrogen production hangs in the balance globally, we are providing the physical infrastructure and intellectual space needed to boost high-efficiency, scalable clean energy.”

To mark the opening, Supercritical hosted a dedicated event for investors, partners and key industry players. The centerpiece of the evening, outside of the facility itself, was a provocative panel session entitled, “Can the UK move from inventing ideas to building global industries?”  and moderated by Supercritical’s Business Development Manager, Dr. Abi Mountain. The panellists- Dom Falcao, Co-Founding Director of Deep Science Ventures (DSV); Siobhan Clarke, Chair, Supercritical; and Sarah Mackintosh, Director, Cleantech for UK- explored the current state of the hydrogen ecosystem, the path to energy sovereignty and the requirements to boost scalability, including policy, partnerships, governance and talent. 

“The conversation highlighted how much vision, passion and expertise there is here in the UK for building the global hydrogen industry,” said Dom Falcao, Co-Founding Director of DSV. “From bringing to life the most advanced innovations to nurturing world-class talent, we are ensuring that British-born companies don’t just invent the future of international climate tech but actually scale it. The entire ecosystem is ready to move at pace, de-risking the technology and securing the global industrial pilots that will turn green hydrogen into a repeatable, reliable reality.”

Supercritical’s Global Tech Centre features precision environments for refining its membraneless electrolysis stacks; integrated spaces allowing for immediate iteration between design and physical assembly; and collaboration zones designed to host partners and stakeholders for co-development projects.

As Supercritical continues to scale both its presence in London and at its dedicated demonstration unit in Teesside, the GTC will serve as the primary engine for its next phase of technical validation and ecosystem engagement.

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About Supercritical Solutions

Supercritical Solutions is pioneering high-pressure, ultra-efficient electrolysis to deliver affordable, renewable hydrogen and oxygen. Founded in London in 2020, the company’s patented membrane-free, PFAS-free, and iridium-free design produces hydrogen at up to 220 bar and 99% purity. Supercritical’s mission is to enable the renewable hydrogen economy by addressing the most challenging 20% of global emissions and driving the transition from fossil-based to renewable hydrogen across industry.

Find out more about how we’re shaping the future of clean energy:

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Email: contact@supercritical.solutions

Website: www.supercritical.solutions