Mariestad Nilsson Energy


HyProvide A60 for a refueling station in Aalborg, to produce green hydrogen based on solar power.

Key Facts

A-Series A60



Production (kg H2/day)


Outlet pressure (bar)


Project location
Project with CleanTech and Calvera Hydrogen

Hydrogen powered city buses in Denmark

Three hydrogen-powered buses were taken into public transportation service in Aalborg,  Denmark in the spring of 2020. The fuel cell  emission free electric buses are fueled by  hydrogen produced on-site at the refueling  station on a GHS HyProvide A-series based  on solar power. The hydrogen buses are estimated to save about 60,000 liters of diesel  fuel each year and reduce CO2 emissions by some 131 tons annually.

Green Hydrogen Systems typically serves as an OEM component supplier, providing electrolyzers to companies that produce or integrate hydrogen refueling stations and other types of hydrogen-producing facilities. In this case, the company also took on the role of EPC, dimensioning the system in terms of capacity, redundancies and other factors. GHS called on Spanish partners Clan Tecnológica (Clantech) and Calvera to provide the facility’s storage, compressor and dispenser technologies.

Electrolysis equipment for every scale


HyProvide A-Series

Available in standardised, modular configurations for maximum efficiency, versatility and scalability, this next-generation technology makes the A-Series one of the most efficient alkaline electrolysers on the market. The unit is designed from the ground up to accommodate the input fluctuations that come with renewable energy sources. Its versatile design allows for application across many different market segments for green hydrogen production.


HyProvide X-series

The X-Series is based on the existing well-proven technology, optimised for use in the growing market for large-scale applications in, for example, industry, energy and heavy-duty transport sectors. Its unique multi-stack concept allows the electrolyser to reach higher voltages crucial to utilise mass-produced, low-cost and high-efficiency power electronics from wind and solar markets operating in the 1000-1500V range.

#9 reasons to choose
our electrolysers

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Søren Rydbirk

CCO, Green Hydrogen Systems