About Us

Accelerating the energy transition

GHH is a consortium of three partners with extensive experience from within the renewable energy sector. An ambition of transitioning to clean, sustainable energy and a commitment to a green circular economy bring Corre Energy, Eurowind Energy, and Gas Storage Denmark together in Green Hydrogen Hub.

Together, they make up a complete Power to X value chain that will ensure the acceleration of the energy transition by using excess energy from renewable energy sources.

Electrolysis hydrogen production and long-duration underground storage

Green Hydrogen Hub Denmark aims to be the first fully commercially viable, 100% green, large-scale hydrogen production, storage, and CAES solution.

GHH aims to expand across Europe and the rest of the world, staying fully aligned with Europe’s Green Deal ambitions to develop hydrogen and energy storage networks to enable the integration of renewables, the development of sectoral integration and the circular economy.

This will be a European flagship green energy project, accelerating the energy transition, promoting the deployment of hydrogen technologies globally, and establishing Europe as a leader in the cross-sectoral integration of renewable energy.




Green Hydrogen Hub Denmark is located in Northern Jutland, Denmark, where large caverns suitable for storage of hydrogen are created in salt deposits.

Our location is close to existing energy infrastructure, including the high-voltage electricity transmission grid, the gas transmission network and underground gas storage and wind resourced in the Northern Seas Region.

This ideal location and the three complementary partners make GHH a complete solution that will enable the true potential of renewable energy. 




Corre Energy develops mass-energy storage facilities which are composed of assets (storage technologies), designed to provide various wholesale and retail storage solutions and services to the energy market.

Eurowind Energy is a leading developer and operator of wind, solar and hybrid projects. Our goal is to create a future fueled on nothing but renewable energy by making investments in renewable energy projects, and our projects are always developed in close collaboration with local competences.

Gas Storage Denmark A/S owns and operates Denmark’s two underground gas storage facilities – the aquifer pore storage facility at Stenlille in the central part of Zealand and the salt cavern facility at Lille Torup in northern Jutland.

Strategic Partners

Hydrogen Valley is a competence center with more than 15 years of experience in establishing concrete Power-to-X projects. They develop concept designs, establish partnerships, encure financing and coordinate projects with Danish and European partners.

Everfuel is producing green hydrogen for zero-emission mobility, designed to be commercially available across Europe. They offer competitive all-inclusive hydrogen supply and fueling solutions.

Power to X

From renewable energy production to storage and utilisation of green hydrogen 

A Power to X (PtX) value chain consists of the generation of renewable energy, the conversion of power into green hydrogen, and a sustainable way to utilise green hydrogen as an energy source. GHH makes up a complete PtX value chain as every link in the chain is accounted for by the three partners.

Green Hydrogen Hub Value Chain

 Eurowind Energy – Renewable Energy

Eurowind Energy is responsible for the generation of green energy through wind and solar power. Eurowind Energy will be constructing and administrating the wind and solar parks as well as offering expert advice when discussing the energy market with its partners.

The aim is to generate as much renewable energy as possible and, naturally, supply the grid with electricity in accordance with the demand, whereupon the excess energy will be converted and then stored.


Corre Energy – CAES-facility

When the weather allows for generation of more energy than what is demanded, this excess energy is used for electrolysis where electricity is converted into green hydrogen. This process happens onsite as to not strain the electricity grid. Once the hydrogen has been produced, it can be transported to nearby storage facilities through underground pipes.

Large salt deposits have created caverns that are suitable for storage of either hydrogen or compressed air. Part of the hydrogen will be used to fuel the CAES-facility where air from the atmosphere is compressed and then stored.

When the renewable energy sources do not produce enough electricity to satisfy the demand, the compressed air can be released from the storage and through turbines in the CAES-facility, it will generate green energy once again.

Corre Energy will be managing the process of electrolysis, the CAES-facility as well as the coordination of the entire project.

 Gas Storage Denmark – Storing Green Hydrogen

The other part of the hydrogen that is produced by electrolysis is stored in its pure form, in another cavern. Gas Storage Denmark has more than 30 years of experience in storing natural gas in underground deposits and will be responsible for developing and storing hydrogen in one of the caverns.

This hydrogen can either be used in its pure form as fuel, or combined with carbon or nitrogen to produce sustainable e-fuels. Thus, green hydrogen can be used directly for the CAES-facility, heat generation, for some transportation and industries, or it can be converted into e-fuels which allows for road, maritime and air transport from renewable energy.

The revolutionary part about GHH is that the green hydrogen can be stored for as long as six months which enables GHH to provide green energy all year round, regardless of the weather.

Green Hydrogen Hub

Thus, energy that is generated from the storage of either hydrogen or compressed air is still 100 % renewable when regenerated.

GHH is not only a complete Power to X value chain, it also ensures that the process happens locally and thereby avoids the cost of transportation and straining the electricity grid.

Other than accelerating the energy transition and supporting a green, circular economy, GHH will also help stabilizing the energy prices. Once energy suppliers are able to control the supply of energy, it is easier to provide stable prices, no matter how windy or sunny it is. 

Our electrolysis
capacity targets are

350 MW

1.000 MW

Our hydrogen
capacity targets are



Our hydrogen
CAES targets are

350 MW

1.000 MW

Project of Common Interest

Projects of common interest (PCIs) are key infrastructure projects that are intended to help the EU achieve its energy policy and climate objectives: affordable, secure and sustainable energy for all citizens, and the long-term decarbonisation of the economy in accordance with the Paris Agreement. The goal is to help countries within the EU to achieve their energy policies and climate objectives.

The Green Hydrogen Hub preserves green energy for times when it otherwise would not be available.

EU Regulation No. 347/2013 (the “TEN-E Regulation”) provides for electricity PCIs to include interconnectors, transmission lines that provide cross-border benefit and large-scale electricity storage projects such as the CAES component of Green Hydrogen Hub Denmark.

The CAES component of Green Hydrogen Hub Denmark is included as project 1.21 on the 5th list of PCIs within the North Seas Offshore Group priority corridor.

Further information on European projects of common interest can be found at Fifth list of energy Projects of Common Interest (PCIs) (europa.eu)