In this work, we aim to determine the optimal performance characteristics of a solar tracking system in order to maximize the power generation through using the MOPSO algorithm. Considering the sun path during a day, the necessity of using solar tracking systems to achieve the maximum power output from photovoltaic (PV) panels is investigated. The solar tracking system allows the PV arrays to follow sunlight all day long. The unidirectional tracking system follows the sun path, thereby, optimizing the angular motion of the PV arrays relative to the sun resulting in a higher power generation. In order to evaluate the performance of a PV system, the total solar radiation is calculated first for both the fixed and unidirectional tracking systems. Analyzing the results indicates that for June 20 th, the power generation of the PV module equipped with a unidirectional tracker is 35% higher than the fixed PV module. The optimal value of the declination angle, Azimuth, and arrays’ tilting angles in a unidirectional tracking system calculated using the MOPSO algorithm are 31. 8° , 178. 2° and 85. 1° , respectively.