The North Adriatic Hydrogen Valley – NAHV project builds on the LoI signed in March 2022 by representatives of the Slovenian Ministry of Infrastructure, Croatian Ministry of Economy and Sustainable Development and Friuli Venezia Giulia (FVG) Autonomous Region in Italy, contributing to the European Green Deal and European Hydrogen Strategy goals. The project’s high-level objective is the creation of a hydrogen-based economic, social and industrial ecosystem based on the capacity of the quadruple helix actors. This will drive economic growth, generating new job opportunities in the framework of both the green and digital transitions and, by creating the conditions for wider EU replicability, it will contribute to the creation of a European Hydrogen Economy, To fulfil these objectives the NAHV project involves a well-rooted partnership of 36 organizations (of which 2 in Hydrogen Europe, 3 in Hydrogen Europe Research), covering the transnational Central European area of 3 territories - Slovenia, Croatia and FVG Region, demonstrating cross-border integration of hydrogen production, distribution and consumption, and exchange of over 20% of NAHV annual hydrogen production of over 5000 tons. The project will activate 17 testbed applications in their related ecosystems, clustered in 3 main pillars - hard to abate, energy and transport sectors. These will act as real-life cases for piloting global hydrogen markets, moving from TRL 6 at the beginning to TRL 8 at the end of the project. Four fuel cell applications in the energy and transport sectors will be demonstrated. Testbeds will then be scaled up at industrial level as a replicable model, contributing to the decarbonisation of the 3 territories by harnessing renewables to improve system resilience, security of supply and energy independence. Replicability will also be ensured for the whole NAHV model, with the uptake of at least 5 additional hydrogen valleys in Europe, particularly in Central and South Eastern Europe.