The Centro Nacional de Experimentación de Tecnologías de Hidrógeno y Pilas de Combustible (CNH2), is a national research centre, aimed at promoting scientific and technological research into hydrogen and fuel cell technologies, at the service of the entire scientific, technological and industrial community.

The CNH2 was created in 2007 as a Public Consortium between the Ministry of Education and Science, currently the Ministry of Science, Innovation and Universities, and the Regional Government of Castilla-La Mancha, each with a 50% stake, and its headquarters are located in Puertollano (Ciudad Real).