SunHydrogen Modules Exceed 10% Solar-to-Hydrogen Efficiency in Sparc Hydrogen Testing, Advancing to Pilot Scale

SunHydrogen's photoelectrochemical and integrated PV-electrolysis modules reached solar-to-hydrogen efficiency above 10% in testing at Sparc Hydrogen's laboratories and produced more hydrogen under concentrated sunlight; under a new Technology Collaboration and Intellectual Property Protection Agreement, the companies will advance the modules through laboratory and pilot-scale testing at Sparc Hydrogen's SHARP facility in South Australia, followed by a jointly funded techno-economic assessment of hydrogen cost.

CORALVILLE, IA, Aug. 11, 2026 - SunHydrogen, Inc., the developer of a breakthrough technology to produce renewable hydrogen using only sunlight and water, today announced that it has entered into a Technology Collaboration and Intellectual Property Protection Agreement with Sparc Hydrogen Pty Ltd, a joint venture of Sparc Technologies Limited, Fortescue Ltd and the University of Adelaide. The agreement follows preliminary testing in which SunHydrogen's modules reached solar-to-hydrogen efficiency above 10%.

Solar-to-hydrogen efficiency measures how much of the energy in sunlight a device converts into hydrogen. Reaching double digits is a widely recognized milestone for technologies that split water directly with sunlight, and only a small number of groups worldwide have demonstrated it. In the same testing, SunHydrogen's modules produced more hydrogen as the sunlight reaching them was concentrated. That behavior supports higher production rates and is central to the economics of Sparc Hydrogen's concentrated-sunlight reactor.

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Under the agreement, the two companies will test whether SunHydrogen's modules can be integrated into Sparc Hydrogen's reactors to lower the cost of producing hydrogen. The work begins with laboratory testing at increasing levels of solar concentration and, if agreed milestones are met, moves to on-sun testing at Sparc Hydrogen's SHARP pilot facility at Roseworthy in South Australia. Those results will feed a jointly funded study of the levelized cost of hydrogen, which is the all-in cost to produce one kilogram of hydrogen.

The collaboration runs for 24 months and is organized in phases, with independent review points and go or no-go decisions before each stage. Each company keeps ownership of the technology it brings to the collaboration and of its own improvements, and a joint steering committee oversees the work.

During the term, Sparc Hydrogen holds rights to apply SunHydrogen's technology in concentrated-light applications above an agreed concentration level, the field in which Sparc Hydrogen specializes. SunHydrogen retains all rights to its core market of decentralized hydrogen production under natural, unconcentrated sunlight. Sparc Hydrogen has also acknowledged that it is not developing its own photocatalyst or photoelectrochemical materials and is not working in SunHydrogen's field of single-sun water splitting.

If the collaboration is completed successfully, Sparc Hydrogen has an 18-month option to negotiate either a long-term supply agreement or a manufacturing license for SunHydrogen's modules for use in its reactors, together with a right of first offer over competing arrangements in that field during the option period.

Sparc Hydrogen's photocatalytic water splitting technology was invented by Professor Greg Metha, Professor of Chemistry and Acting Director of the Centre for Energy Technology at the University of Adelaide, whose research the company was founded to commercialize. In 2021, Professor Metha's group produced hydrogen using only concentrated sunlight, water and a photocatalyst, and his laboratory has pioneered photocatalytic reactors that operate under concentrated light. He also established the international Hydrogen Production Technology (HyPT) forum and serves as Australian Director of the NSF-CSIRO Global Center for Hydrogen Production.

“Seeing our modules tested above 10% solar-to-hydrogen efficiency, and produce more hydrogen as sunlight is concentrated, is exactly the kind of outside validation our shareholders want to see,” said Tim Young, CEO of SunHydrogen.

“It is an honor to work alongside Professor Greg Metha, whose pioneering work in concentrated-light photocatalysis underpins Sparc Hydrogen's reactor. This collaboration lets us prove our modules in a system built by specialists in the field, while we stay focused on our core mission of low-cost, decentralized hydrogen from sunlight and water. It gives both companies a clear, milestone-driven path from the lab to pilot scale.”

“Sparc Hydrogen's strategy is to work with the world's leading developers of photocatalyst and photoelectrochemical materials, and this collaboration with SunHydrogen reflects that approach,” said Alana Barlow, CEO of Sparc Hydrogen.

“We have seen solar-to-hydrogen efficiencies above 10% in the lab, and evidence that higher solar concentration increases hydrogen yield, the core benefit our technology is built to deliver. This agreement sets a clear, milestone-driven path to prove that out to pilot scale, on terms that open a route to commercialization.”

"Concentrated sunlight is a demanding environment for a photoelectrochemical device, so validating efficiency above 10% while running under higher solar flux and producing more hydrogen as light was concentrated is a strong starting point," said Dr. Syed Mubeen, Chief Technology Officer of SunHydrogen.

"We look forward to integrating our modules into the Sparc reactor and proving them out at increasing concentration, on-sun at SHARP."

About SunHydrogen, Inc.

SunHydrogen is developing breakthrough technologies to produce renewable hydrogen in a market that Goldman Sachs estimates to be worth $1 trillion+ per year by 2050. Our patented SunHydrogen Panel technology, currently in development, uses sunlight and any source of water to produce low-cost renewable hydrogen. Like solar panels that produce electricity, our SunHydrogen Panels will produce renewable hydrogen. Our vision is to become a major technology supplier in the new hydrogen economy. By developing, acquiring and partnering with other critical technologies, we intend to enable a future of emission-free hydrogen production for all industrial applications such as fertilizer and petroleum refining as well as fuel cell applications for mobility and data centers. To learn more about SunHydrogen, please visit our website at www.SunHydrogen.com.

About Sparc Hydrogen

Sparc Hydrogen is a joint venture between Sparc Technologies Limited (ASX: SPN), Fortescue Ltd and the University of Adelaide, developing green hydrogen technology using photocatalytic water splitting, a process that uses only sunlight, water and a photocatalyst to produce hydrogen without an electrolyzer. Sparc Hydrogen's patented reactor uses concentrated sunlight to improve the economics and scalability of the approach. To learn more, please visit www.sparchydrogen.com.