The H2med project Supplying Europe with affordable carbon-free energy

The H2med project is a transnational initiative to interconnect the hydrogen networks of the Iberian Peninsula to Northwest Europe, enabling Europe to be supplied with affordable green hydrogen by 2030. This initiative was launched by France, Spain and Portugal, with a strong support by Germany, and is promoted by the TSOs of these countries: Enagás, GRTgaz, OGE, REN, and Teréga.

On the 20th of October 2022, alongside the Council of the European Union, the President of the Government of Spain, the President of the French Republic and the Prime Minister of Portugal decided to accelerate the development of energy interconnections and to create a green energy corridor connecting Portugal, Spain and France with the European energy network. They also agreed on the conclusion of a hydrogen interconnection between Portugal and Spain (Celorico da Beira – Zamora) as well as the development of a maritime pipeline connecting Spain and France (Barcelona – Marseille) in order to transport renewable hydrogen from the Iberian Peninsula to North and Central Europe. The three leaders ratified this commitment in the Euromed Summit on December 9th, 2022, in Alicante, with the support of the President of the European Commission Ursula von der Leyen.

Building on this political commitment, Enagás, GRTgaz, REN and Teréga have been cooperating since the 20th of October 2022 to provide technical advice to their respective governments related to the development of H2med. The four infrastructure operators signed a Memorandum of Understanding (MoU) to formalise their commitment to collaborate on the joint development of H2med, following the mandate of the Governments of the three countries given at the Euromed Summit. The objective of this partnership is to make the infrastructure available as of 2030. On December 15th, 2022, the four transmission system operators also jointly submitted the H2med project as candidate for the Project of Common Interest (PCI) under the new regulation on Trans-European Energy Network (TEN-E).

On January 2023, Germany has decided to lend its support and join France, Spain, Portugal for this hydrogen corridor. “We have decided to expand the H2med project which, with the support of European funding, will connect Portugal, Spain, and France to Germany, which will be a partner in this hydrogen infrastructure strategy,” declared the French President Emmanuel Macron during a joint press conference  with German Chancellor Olaf Scholz, on the occasion of the 60th anniversary of the reconciliation treaty between Paris and Berlin. 

On October 18th, 2023, the German TSO OGE joined the H2med project during the presentation of the corridor in Berlin. OGE’s involvement in the H2med initiative stresses the vital importance for Germany of a reliable hydrogen import corridor.

On the 8th of April 2024, the list of Projects of Common Interest (PCI) / Projects of Mutual Interest (PMI) was officially published in the Official Journal of the European Union, which includes the H2med project.

Check back this page regularly to keep updated on the latest developments.


The routes

  • 703 km of pipeline length
  • 2 MTPA (million tonnes per annum) of transmission capacity
  • ≈ €2.50 billion overall budget
  • Target commissioning: 2030
  • 248 km of pipeline length
  • 0.75 MTPA (million tonnes per annum) of transmission capacity
  • ≈ €350 million budget
  • Target commissioning: 2030
  • 455 km of pipeline length
  • 2 MTPA (million tonnes per annum) of transmission capacity
  • ≈ €2,135 million budget
  • Target commissioning: 2030

The corridor can transport 10% of expected hydrogen consumption in Europe by 2030

CelZa: linking Portugal and Spain with green hydrogen

CelZa is a 248 km pipeline project joining Portugal and Spain, connecting Celorico da Beira (Portugal) to Zamora (Spain). It will be a bridge between the developing core hydrogen backbones of both countries. Each of the two TSOs involved, REN and Enagás, will fully own their section of the infrastructure: 162 km in Portugal, 86 km in Spain.

CelZa will be a 100% hydrogen transmission infrastructure that will be the prime export medium for hydrogen produced in Portugal from renewable energy sources, most notably solar and wind.

BarMar: linking Spain and France with green hydrogen

BarMar is a 450 km offshore hydrogen pipeline project that will join Barcelona (Spain) to the industrial hub in Fos-sur-Mer, near Marseille (France). The project will be a major connection to export hydrogen produced in Portugal and Spain from renewable sources (essentially solar and wind) at competitive costs, to the French hydrogen backbone itself connecting to the developing hydrogen infrastructure in Germany and the rest of Northwest Europe.

Technical specifications

CelZa BarMar
Length 248 km 450 km
Diameter 28″ 28″ or 42″
Maximum depth / 2,600 m
Operating pressure up to 100 bar Up to 210 bar
Compressor station
Power 24.6 MW Up to 140 MW
Maximum transmission capacity 0.75 Mt 2 Mt
Budget ≈ €350 million ≈ €2,135 million

H2med potential and benefits for Europe

Energy and Environmental


Transport 10% of expected hydrogen consumption in Europe by 2030


Accelerate Europe’s decarbonization roadmap


Supply Europe with carbon-free hydrogen produced at competitive costs


Ensure the flexibility of the energy network through access to hydrogen underground storage capacities



Contribute to European and national objectives for the deployment of the hydrogen sector


Enable the development of hydrogen valleys and an intra-European industry with high added value


Facilitate the creation of ecosystems of decarbonization

Project timeline



Oct. 20th, 2022

France, Spain and Portugal take the decision to work together to create a green hydrogen corridor in Southern Europe bound for Northern Europe.

Dec. 9th, 2022

Mandate given to the gas transmission operators Enagás, GRTgaz, REN and Teréga to develop the H2med project and its two infrastructures, BarMar and CelZa at the Euromed summit in Alicante with the support of the President of the European Commission, Ursula Von Der Leyen.

Dec. 13th, 2022

Signing of an MoU (Memorandum of Understanding) by the four European transmission system operators: Teréga, GRTgaz, Enagás and REN.

Dec. 15th, 2022

The four European transmission system operators Enagás, GRTgaz, REN and Teréga, submit the project as a candidate for the Project of Common Interest (PCI).

Jan. 2023

Joint declaration by the French President, Emmanuel Macron, and the German Chancellor, Olaf Scholz, to extend the H2med project to Germany

Oct. 18th, 2023

The German operator OGE joins the four initial European network operators as promoter of the H2med project.

Nov. 28th, 2023

Publication of the delegated act proposing the H2med project to be included into the list of Projects of Common Interest (PCI) and projects of mutual interest (PMIs) by the European Commission

Apr. 8th, 2024

Publication of the list of Projects of Common Interest (PCIs) and Projects of Mutual Interest (PMIs) in the Official Journal of the European Union.

April – Oct 2024

Project application for EIM (European Interconnection Facility) funding EIM also known as ‘CEF.E’ The European Interconnection Facility (EIF) for energy is the EU’s funding programme to implement the Trans-European Energy Networks policy.

Sept-Nov 2024

PCI application for renewal of PCI status


Validation of CEF.E funds for studies


Validation of the CEF.E financing mechanism for construction and final decision on investment in the latter. Publication of the second PCI list


Implementation: engineering, permit management, procurement and construction


Start date

What’s on the news ?