The most expensive part of green hydrogen is often the journey from the electrolyzer to the ship. Onestone Holdings Inc., a quiet group based in Coos Bay, Oregon, is trying to cut that trip down to a few meters. They have taken the electrolyzer to the ship, and the power source to the wind blowing over its deck.
According to a trade report, the company has successfully produced green hydrogen using vertical-axis wind turbines mounted on an oceangoing vessel, converting the captured energy directly into liquid hydrogen onboard [POWER Magazine, June 2024]. It is a neat, almost obvious, piece of systems thinking. Instead of building a massive wind farm on land, piping electricity to a coastal electrolysis plant, then chilling and pumping the hydrogen onto a carrier ship, you do it all in one floating package. The vessel becomes both the factory and the first tanker.
The Maritime Wedge
The initial application is self-evident: fuel for the shipping industry itself. A separate academic study, not directly linked to Onestone but relevant to the concept, found that a ship using a vertical-axis wind turbine reduced fuel consumption and CO2 emissions by nearly 39% under good wind conditions [ScienceDirect, retrieved 2026]. Onestone’s bet is more ambitious. They are not just assisting the diesel engine, they are aiming to replace its fuel entirely with hydrogen produced from the same wind. The company claims this approach eliminates the need for complex and energy-intensive onshore infrastructure, which is a polite way of saying it avoids the billion-dollar port-side developments that have stalled many green hydrogen projects [POWER Magazine, June 2024]. Their first market is the one they are literally floating in.
An Honest Counterfactual
The concept is compelling, but the path from a successful experiment to a commercial fleet runs through a gale of hard questions. The public record is strikingly thin on the details that turn a prototype into a business.
- The team. The company’s own websites and the primary press coverage do not name founders, executives, or technical leadership [grlh2.com, retrieved 2024] [1stone.org, retrieved 2024]. For a capital-intensive hardware venture, the absence of a public team with maritime or energy project experience is a notable gap for potential partners.
- The capital. No funding rounds, grants, or investors are disclosed. Building and operating specialized hydrogen-producing vessels is not a bootstrappable endeavor.
- The customers. There are no announced offtake agreements or pilot customers. For a fuel supplier, a named buyer is the most credible traction signal.
The company’s most plausible answer is that the experimental proof-of-concept is the necessary first step to de-risk the technology before seeking those partnerships and capital. They have, at least, demonstrated the core technical loop works on the water.
A back-of-the-envelope calculation highlights the efficiency hurdle. If that cited 38.66% fuel savings came from a turbine assisting a diesel engine, producing enough hydrogen to fully replace the diesel would require capturing roughly two and a half times more wind energy. That means more turbines, larger electrolyzers, or simply accepting that the vessel’s range and speed will be dictated by the weather. It is a fundamental trade-off between operational flexibility and fuel cost.
For Onestone Holdings to matter, its floating hydrogen factories must ultimately compete on cost and reliability with the coming fleet of large-scale, land-based green hydrogen plants. That is the incumbent it must beat. The bet is that the simplicity of a mobile, integrated system will outweigh the economies of scale of a fixed megaproject. It is a very long way to Coos Bay, but the wind, at least, is free.
Sources
- [POWER Magazine, June 2024] Group Produces Green Hydrogen Using Wind Turbines on Ships | https://www.powermag.com/group-produces-green-hydrogen-using-wind-turbines-on-ships/
- [grlh2.com, retrieved 2024] Home - Onestone Holdings Inc. | https://www.grlh2.com/
- [1stone.org, retrieved 2024] ONESTONE HOLDINGS INC | https://1stone.org/
- [ScienceDirect, retrieved 2026] Fuel consumption and emissions reduction by using wind-assisted ship propulsion | https://www.sciencedirect.com/science/article/pii/S2590174526300015