Stiesdal Hydrogen Plant in operation in Glansager Denmark at a PtX plant site.

The 3.1 MW HydroGen Electrolyser

Each 3.1 MW electrolyzer is a self-contained unit consisting of four European-made main modules designed exclusively for outdoor installation. By eliminating the need for complex industrial buildings, the system simplifies site preparation and scales linearly.

Technical specifications

Green hydrogen production relies on intermittent wind and solar energy. This requires hydrogen systems that can operate as flexible electricity consumers.

HydroGen’s active front-end is designed for this future, enabling hydrogen production to participate on the demand side of electricity markets while following variable renewable power generation.

  • Nominal AC power input: 3.1 MW
  • Production rate (pure H₂): 639 Nm³ per hour
  • System power consumption (AC): 4.7-5.0 kWh/Nm³
  • Hydrogen delivery pressure: ambient to 35 bar
  • Hydrogen purity: 99.5%
  • Operating range: 25-100%
  • Ramp-up rate: 1% power per second
  • Ramp-down rate: 100% power per second
  • Stack lifetime: 80,000 hours or 10 years @ 100% CF
  • Zero degradation concept
Download product brief

Scope of supply

  • Pressurized Alkaline stack including temperature control
  • Power supply (PSU) module with active rectifier based on IGBTs and supply for auxiliaries
  • UPS-backed unit control system including dedicated safety PLC
  • Auxiliary module including pumps, and heat exchanger
  • Cooling systems for stack, PSU, and gas
  • Pressure vessel including vents, gas & water separation, and high performance diffusion filter
  • Process and electrical interconnections within and between modules

System price

  • EUR 2,100,000 – 2,250,000

24 months warranty period, Stiesdal Hydrogen standard terms, conditional on volume and delivery period.

Two 3.1 MW HydroGen Electrolysers at a customer site. Each system unit is built from standardised and modularised components.
The pressurised tanks enable the stacks to supply hydrogen at pressures up to 35 bar without the need for compression.
The electrode stack system is a novel design that allows the full stack to be easily handled in and out of the electrolyser pressure vessel.
The main system component, the pressurised tank containing the electrode stack, being delivered to a customer site.
The power and process modules are standardised components supplied by established industrial partners.
Three 3.1 MW units are operating at the Glansager site in Denmark, demonstrating a practical pathway towards large-scale, cost-effective green hydrogen production.

Send me your questions

Contact Esben Baltzer Nielsen, Head of Sales and Business Development, if you have unanswered questions or want to discuss your hydrogen project.

ebn@stiesdal.com
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