The first part of the final paper describes the idea and operation of the device for recording the current-voltage characteristic. At the beginning of the work, the principle of operation and the very idea of the device are described. The following sections describe its implementation in practice and the development of the device through the first generation of IVS1 until the final minimized and practically realized IVS2. In the second part of the final paper, the operation of the photovoltaic cell/module is described. The important characteristic points when performing measurements and drawing the current-voltage curve are explained. The influence of incident angle of light on the photovoltaic module and its connection with the power given by the photovoltaic module, are also described. The third part of the final paper describes the operation of IVS2, the necessary components for the practical design of the device. The manual generation of current and voltage characteristics, the basics of IVS1 operation and the advantages of improved IVS2 compared to the previous version are described. The fourth part describes the practical implementation of IVS2. In this final paper we made a version of the device for recording the characteristics of the photovoltaic module with the help of a printed board and an electromagnetic relay. In the fifth part, measurements were performed and shown using the device. The characteristics for different lighting conditions were recorded and attached. The measurement conditions are described ,and the components used are listed.