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Hydrogen as carbon-free energy carrier, produced from renewable sources like wind, solar or hydro power, is a promising option to overcome the impacts of the anthropogenic climate change. Recently, great advances regarding the early market introduction of FCVs have been achieved. As the availability of hydrogen refueling stations is highly limited, a modular, scalable and highly efficient hydrogen supply infrastructure concept is presented in this paper. The focus lies on cost-effectiveness and flexibility for the utilization in different applications and for growing markets. Based on the analysis of different use cases, the requirements for the newly developed concept are elaborated. The modular system design, utilizing a standardized high pressure PEM electrolysis module, allows a scalable hydrogen production of up to several hundred kilograms per day.