The 6.5 MW HydroGen Electrolyser
Each 6.5 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: 6.5 MW
- Production rate (pure H₂): 1,275 Nm³ per hour
- System Power Consumption (AC): 4.8-5.1 kWh/Nm³
- Hydrogen delivery pressure: ambient to 35 bar
- Hydrogen purity: 99.5%
- Operating range: 15-100 %
- Ramp-up rate: 2% power per second
- Ramp-down rate: 50% power per second
- Stack lifetime: 60,000 hours or 7 years @ 100% CF
- Footprint: 22 m² per MW
- Zero degradation concept
Scope of supply
- Pressurised Alkaline stack including temperature control
- MV transformation included
- 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 3,150,000 – 3,300,000
24 months warranty period, Stiesdal Hydrogen standard terms, conditional on volume and delivery period.
Proven technology, power boosted, not reinvented
The 6.5 MW unit is built on Stiesdal Hydrogen’s commercial 3.1 MW platform. No new tech-nologies, no new chemistries, no new supply chain. The same European Tier-1 partners, the same standardised modules, the same field-proven control system.
The increased hydrogen production is reached by doubling the current density on Stiesdal Hydrogen’s proprietary electrode and stack design. With in-house laboratories and modern short stack testing facilities, Stiesdal Hydrogen has tested the durability and long-term effect of increased current density with positive results.
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.