The project to build a hydrogen refuelling station at EMT's Entrevías operations centre involves the development of one of the first public infrastructures of its kind in Spain and the first in Madrid to be developed entirely by Spanish companies, including its design, construction and subsequent management, for which EMT Madrid will be responsible. This infrastructure promotes non-polluting public transport using green hydrogen technologies, leading to clean, sustainable and zero-emission mobility. This refuelling station, which will provide hydrogen instead of fossil fuels and will offer a refuelling service for both light vehicles (cars, etc.) and heavy vehicles (buses, etc.), aims to further decarbonise Madrid's economy through a significant reduction in pollution in the city, as well as a considerable decrease in dependence on fossil fuels. The hydrogen refuelling station, which will cover the entire hydrogen cycle (production, storage and distribution), integrates innovative hydrogen and fuel cell technologies in the transport sector. The first ten buses in the EMT fleet will start to be fuelled with the green hydrogen produced at this refuelling station in the first months of 2024. The infrastructure consists of equipment that produces hydrogen through electrolysis, and is capable of producing up to 440 kg/day of hydrogen; a low-pressure membrane compressor, capable of accumulating up to 500 kg of hydrogen at 30 bar; a low-pressure storage tank capable of storing up to 500 kg of hydrogen at 30 bar; two high-pressure storage systems, capable of storing up to 500 kg of hydrogen at 30 bar; two high-pressure storage systems, one with 120 kg of hydrogen storage at 500 bar and one with 45 kg at 900 bar; a cooler that can cool H2 to -40°C prior to vehicle refuelling and a dispenser with two nozzles at 700 bar (light vehicles) and one at 350 bar (heavy vehicles) with infrared sensor communication to maintain intercommunication between systems to protect safety conditions. These construction works will be co-financed by the European Regional Development Fund with €2,131,396.64.