With the increasing share of distributed renewable energy sources in the electricity supply, the need for storing excess energy is also growing, as energy production and consumption are predominantly unaligned. Hydrogen has significant potential as a possible intermediate energy storage medium. The energy bound in hydrogen can be converted into electrical energy using fuel cells. In this thesis, we focus on fuel cell stacks, particularly on a proton exchange membrane fuel cell stack. Such a stack is part of an experimental system where we conducted measurements to determine the characteristics of the fuel cell stack. The measurements were carried out using an electronic load that subjected the stack to a constant electric current. The obtained characteristics were compared with those predicted by the manufacturer of the fuel cell stack. In conclusion, we confirmed the match of the characteristics.
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