New industrialised unit nearly doubles hydrogen production and brings system CAPEX below €500/kW, approximately half the European market average. The 6.5 MW electrolyser is built on the same proven platform that has been in commercial operation since 2023.

18 May 2026 – Stiesdal Hydrogen introduces a new 6.5 MW HydroGen Electrolyser. The new unit nearly doubles the output of the company’s commercial 3.1 MW platform from roughly the same footprint, enabling hydrogen plants with fewer units, simpler balance of plant, and a lower levelised cost of hydrogen (LCOH).

The 6.5 MW HydroGen Electrolyser is built on the same modular, outdoor-installed pressur-ised alkaline platform that has been proven and commercially operated since 2023.
The platform’s deployment record includes European Energy’s Måde PtX facility in Denmark, where Stiesdal Hydrogen’s fifth unit went from site delivery to first hydrogen in 16 days.

“We’ve doubled the production on roughly the same footprint, reducing LCOH through in-creased power on our existing technology. This means fewer units to install, simpler balance of plant, and a faster route from decision to first hydrogen. With this boost we halve the price per MW compared to the current European market average.”

– Esben Baltzer Nielsen, Director of Sales and Business Development at Stiesdal Hydrogen

The system CAPEX below €500/kW for a 6.5 MW Stiesdal electrolyser includes the MV transformer. Specific pricing is based on Stiesdal Hydrogen’s standard terms and conditions and may vary as a function of delivery schedule, volume, warranty period duration, etc.

This is approximately half the European market average of around €1,000/kW on similar scope, based on Stiesdal Hydrogen analysis drawing on data from the European Hydrogen Observatory.

Designed for dynamic operation with zero degradation

“The new 6.5 MW unit is particularly attractive for projects that operate dynamically to capture low power prices. Here, the CAPEX advantage becomes particularly pronounced. Our technology platform is designed for fast ramp rates and frequent start and stops without affecting the lifetime or performance. Per MW operation and maintenance costs are reduced by approximately 50 % compared to the 3.1 MW platform.”

– Esben Baltzer Nielsen, Director of Sales and Business Development at Stiesdal Hydrogen

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.