The Europ’s energy distribution grid’s continuing development makes finding innovative ways to energy storage imperative. One promising approach is the reversible solid oxide cell (ReSOC), with hydrogen as an energy carrier. At its core, a ReSOC is an electrochemical cell that can operate both as an electrolyzer and a fuel cell. Empirical research of such cells consists of large parts by conveying electrochemical impedance spectroscopy (EIS) at a wide range of different running conditions. To improve the current research process, the test rig for the characterization of solid oxide fuel cells and electrolysis cells could be up to date. These characterizations consist of a set of operating points defined by the cell temperature, the fuel/anode gas composition, the cathode gas composition, and the current applied to the cell.