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This paper focuses on the design of fuel cell and electrolyzer emulators used for photovoltaic applications. These emulators are based on power electronic circuits. The reference values of the two emulators are taken from fuel cell and electrolyzer mathematical models. In this study, proportional integral regulators are used. A power management is established to ensure a balance between production and consumption. The simulation results show the good performances of the two emulators to produce the electrical behaviors as well as real systems.