The results of the study of the effectiveness of the search algorithm for selecting the maximum power from solar panels by a step-up pulse semiconductor converter in the conditions of dynamic changes in illumination are presented. An analysis of the mathematical model of solar panels was carried out, which determines the volt-ampere characteristics and power characteristics of the solar panel as a function of its voltage. A search algorithm for determining the mode of operation of the semiconductor converter, which ensures the mode of maximum power selection from solar panels, has been developed. This algorithm can be applied to various types of converters, in which the value of the input current depends on the filling factor of pulse-width modulation. In the Matlab software, a corresponding simulation model of the DC-DC boost converter, which selects the power of solar panels at different levels of solar radiation, was developed, with the help of which the efficiency of the developed algorithm was determined. In the course of the simulation, it was determined that the developed algorithm provides a fairly high efficiency of solar panel power extraction, which is a fairly high indicator compared to the described algorithms. It was determined that the dynamic properties of the semiconductor converter, which takes power from solar panels, directly affects the time of transition to the mode of taking maximum power. During the first switch-on, the output to the point of maximum power is about 1.2 seconds, in further operation, the transition occurs almost instantaneously for a time that corresponds to the time constant of the converter. Given that the processes of changing the level of sunlight take minutes, this time is acceptable.