Abstract <p>The current–voltage (<i>I</i>–<i>V</i>) characteristic of a photovoltaic module is a source of a large amount of information about its condition and operation. In this work, a method for recording the <i>I</i>–<i>V</i> characteristic of a photovoltaic module by discharging it into a supercapacitor bank is proposed. The results of experimental investigations are presented, including those obtained using alternative methods for recording the characteristic. It is shown that the main problem is the variability of the incident solar radiation intensity during the time required to record the <i>I</i>–<i>V</i> characteristic of the module. Further development of the methodology requires optimization of the supercapacitor bank capacity depending on the measurement conditions.</p>