Hydrogen is recognized as a vital energy vector in the journey towards a low-carbon future, offering a clean energy source with zero carbon emissions. Its versatility makes it suitable for various applications, including powering heavy-duty vehicles. In Spain, the development of a territorial hydrogen station infrastructure is underway to support the use of hydrogen in heavy-duty transportation. While the current number of hydrogen stations in Spain is limited, there are plans to expand the network in alignment with the 'Hydrogen Roadmap: A Commitment to Renewable Hydrogen' initiated by the Spanish Government. Efforts are being made to address the challenges associated with hydrogen stations for heavy-duty vehicle fleets, managed mainly by large logistics operators. Research is focusing on strategic placement of hydrogen refueling stations to optimize costs and meet the demand effectively. Additionally, safety risks related to hydrogen refueling station operations are being considered to ensure the safe adoption of hydrogen-powered heavy-duty vehicles. A study is being conducted to explore the difficulties of hydrogen stations for heavy-duty vehicles, with a focus on physical modeling to understand the system better. The study involves decomposing the hydrogen station into smaller subsystems, analyzing them individually, and then integrating them into a comprehensive model. By utilizing a top-down approach, the interactions between subsystems are examined, providing insights into the development of hydrogen stations for heavy-duty vehicle fleets. Furthermore, the research explores the production of hydrogen colors based on the source of electricity used, with a mix of green, pink, blue, and gray hydrogen being produced depending on the production processes. Overall, the article conveys a positive sentiment towards the integration of hydrogen as a sustainable energy source for heavy-duty vehicles.