The axial direction of a flat uniaxial tracker is generally the north-south axis. The basic principle of its operation is to ensure that the module is at a right angle to the sun's rays in the east-west direction. Therefore, a flat uniaxial tracker tracks the azimuth of the Sun, not the height angle. Since the tracking range is generally -60 ° -60 ° , if the module is following the Sun in real time, the required tracking angle will generally exceed the tracking range and remain at ± 60 ° in the morning or evening when the solar altitude angle is small, the front row of components blocks the back row.