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Alkaline Electrolysers

HydroGen Electrolyzer

Stiesdal AS

  • Industrialized design for mass production
  • Self-contained system suitable for easy transportation and outdoor installation
  • Minimal Balance-of-Plant requirements with plug-and-play unit installation
  • Unique pressure vessel concept enabling high hydrogen delivery pressure without additional compression
  • Dynamic operation capability to follow volatile electricity spot prices or wind and solar PV output

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Description Vendor

The HydroGen Electrolyzer is an industrialized unit for pressurized hydrogen production at low cost. It represents a lean integrated product design of previously unattainable simplicity, designed for industrialized mass production. The system is modular, self-contained, and suitable for easy transportation and outdoor installation, requiring no buildings. It features minimal Balance-of-Plant requirements, a unique pressure vessel concept enabling high hydrogen delivery pressure without additional compression, and dynamic operation capability to follow volatile electricity spot prices or wind and solar PV output. The HydroGen Electrolyzer is at the forefront of advancing true low-cost green hydrogen production. It is designed to become an integral part of next generation Power-to-X facilities, with a supply chain-centered design strategy and industrialized implementation. The electrolyzer uses alkaline technology, which is compatible with mass production and uses abundant elements without noble metal catalysts. It offers plug-and-play installation, with a dynamic range of 25-100% and a dynamic ramp-up rate of 1% load per second.

Use Cases

  • Producing hydrogen for fossil fuel substitution
  • Integration into Power-to-X facilities
  • Flexible consumer of electricity in renewable energy systems

Capabilities

  • Industrialized design for mass production
  • Plug-and-play installation
  • Dynamic operation capability
  • High hydrogen delivery pressure without additional compression
  • Easy transportation and outdoor installation
  • Minimal Balance-of-Plant requirements
Stiesdal AS Stiesdal AS is a Danish climate-technology company whose activities span offshore wind, green hydrogen, and carbon-management technologies, with an operating model focused on industrializing energy technologies through standardized designs and manufacturing partnerships. Its hydrogen activities are carried out through Stiesdal Hydrogen, which develops green-hydrogen plants for Power-to-X applications and draws on the company's broader experience in renewable-energy engineering, product development, and industrial scale-up. The hydrogen business is centered on the HydroGen electrolyzer, a modular alkaline system designed as a 3.1 MW unit that can produce up to approximately 57.5 kg of hydrogen per hour and deliver hydrogen at pressures up to 35 bar. Stiesdal has designed the system around modular plant architecture, outdoor installation, and reduced balance-of-plant requirements so multiple units can be combined into larger projects and operated with variable renewable electricity. The company works with industrial manufacturing and project partners to move the technology from development into repeatable deployment. Within the hydrogen value chain, Stiesdal therefore operates primarily as an electrolyzer and green-hydrogen plant technology supplier serving Power-to-X developers and industrial users rather than as a hydrogen distributor or refueling operator.
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