Accelerating the global energy transition with green hydrogen

Green Hydrogen Systems designs and manufactures efficient, standardised and modular electrolysers for the production of green hydrogen with renewable energy. 


Founded in Denmark

+ 10 years

R&D has led to advanced
electrolyser technology

75 MW

Yearly production capacity,
with a scale-up plans in place

+ 15

Employees and

Our electrolysers make an excellent choice for Industry, Transport and Power-to-X applications. the modularity of our technology fits all scale solutions ranging from unlimited-MW applications to stand-alone and smaller clusters.

Start small or
cluster to scale

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.

The X-series is based on the existing well-proven technology, optimised for use for large-scale ap-plications like industry and heavy-duty transport sectors. Its unique multi-stack concept allows the electrolyser to reach higher voltages of up to 1200 V, crucial to utilise mass-produced, low-cost and high-efficiency power electronics from wind and solar markets operating in the 1000-1500V range. Designed explicitly for large-scale decarbonisation of the industry, mobility and energy sectors.

#9 reasons to choose
our electrolysers

Mature Technology

Our products are built commercially proven pressurised alkaline technology

high Efficiency

One of the most efficient solutions on the market with competitive energy to hydrogen conversion


modular solutions that
are suited for rapid scale-up, clustered solutions and serial production

Dynamic operations

The electrolysers are designed to operate handle variable
loads suitable for renewable energy


High durability (10+ year stack durability) and system uptime

High output pressure

the 35 bar hydrogen output
pressure allows for a small
product footprint and lower
compression costs

Compact Design

Small footprint due to compact modular design increasing number of applications

Sustainable Process

Production process indepenent from scarce and price-sensitive materials like iridium and platinum


Versatile design allows for application across many different market segments for green hydrogen production.

What customers say about us

''We could not be more pleased with the outcome of this project. The comparatively low cost of green hydrogen that GHS is able to deliver has opened the door to significant environmental benefits for our community.''
Christian Twitchett
Department of Public Transportation and Mobility in Denmark’s North Jutland region
''Green Hydrogen System’s electrolysers and on-site production approach have enabled us to start meeting our customers’ demand for solar-produced hydrogen''
Hans-Olof Nilsson
Nilsson Energy, Sweden

Our electrolysers in action
selected cases

Siemens site Green Hydrogen Systems Brande
Case story
Installation with Siemens turbine
Bluebird CPH Delivery Web JPG 1500px 80�-4
Case story
Mariestad hydrogen refueling station
Case story
Aalborg hydrogen refueling station
Interim Report H1 2022

Interim Report H1 2022

Green Hydrogen Systems publishes Interim Report for the first six months of 2022. Today, Green Hydrogen Systems released its Interim…
Trading Statement Q1 2022

Trading Statement Q1 2022

2022 started out on a positive note with several new customer orders. Unfortunately, in April, we faced certain technical design…
Another order from Logan Energy

Another order from Logan Energy

Green Hydrogen Systems receives a new order from Logan Energy for a project in Scotland Green Hydrogen Systems, a leading…

At Green Hydrogen Systems, my colleagues and I are convinced that green hydrogen will be at the heart of the future energy systems – and we are committed to be on the forefront of this energy transition.

Sebastian Koks Andreassen
CEO, Green Hydrogen Systems