To test commercially available water electrolysis systems under dynamic (close-to-real) operation a test area with three different electrolyzers is build up, covering the significant technologies alkaline water electrolysis, proton exchange membrane water electrolysis, and high temperature steam electrolysis using solid oxide electrolysis cells. The hydrogen outputs of the systems are in the range between 5 to 10Nm(3)h(-1) hydrogen at delivery pressures between 10 and 35bar. Additional balance of plant is installed to demonstrate and evaluate the utilization of hydrogen for different applications.