Direct solar-to-hydrogen start-ups Sparc Hydrogen and SunHydrogen could combine technologies under a new technology-focused intellectual property agreement.
Following “highly encouraging” preliminary testing, the Australia-US duo will explore the viability of integrating SunHydrogen’s solar modules into Sparc’s reactors through a techno-economic analysis.
The collaboration agreement spanning two-years will begin with laboratory testing of the integrated systems at progressively greater solar concentrations, culminating in full solar testing at Sparc’s pilot photocatalytic water splitting plant.
It could result in Sparc negotiating a long-term commercial supply or manufacturing license of SunHydrogen’s modules.
In August 2025, SunHydrogen first demonstrated its 1.92m2 hydrogen module in on-sun conditions, and in November, Sparc began “sustained” hydrogen production at its University of Adelaide pilot plant.
Sparc has garnered previous support from Australia’s national science agency, CSIRO, and the Australian Economic Accelerator Innovate programme.
Earlier this year, SunHydrogen inked a licensing agreement with Chinese-owned CTF Solar to manufacture its technology.
While direct solar-to-hydrogen technologies are broadly in early-stage development and exhibit lower efficiency rates than electrolysers, proponents praise their ability to utilise the abundant and cheap resource of solar irradiance.
However, critics argue that the technology faces material limitations with its requirement for precious group metals and technical concerns around hydrogen and oxygen separation.
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