The article investigates a device for tracking the position of the sun during the day - a tracker for solar power plants. The practice of using solar trackers as a device to increase the efficiency of solar power plants is considered. The relevance of this development in Ukraine and prospects for its development are determined. Methods and principles of increasing the efficiency of solar energy production, expediency of using trackers for solar power plants are analyzed. The aim of the article is to present the stages of development of a biaxial solar tracker and the algorithm of the controlling the angle of inclination of solar panels placed on a moving platform, relative to the obtained data on the position of the sun. The article presents a tracker for solar power plants, its structure and algorithm. It is stated that the principle of operation is to analyze the current position of the sun and automatically set the movable platform with solar panels in the most effective position.