الفهرس 
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Abstract
The aim of this thesis is to develop a microcontroller-based solar tracking system, evaluate the performance of photovoltaic cells, and assess the value of using single and dual-axis solar trackers as means for improving the performance of photovoltaic generation systems. The various influential factors affecting the performance of photovoltaic cells . Two experimental test setups were designed, implemented and used to collect the evaluation results at a site that is located at El-Minia university ( 28° N latitude, 31° E longitude) .One of the test setups included a monocrystalline photovoltaic panel that is fixed at a reference inclination angle of 28° with respect to the horizon, and facing due south. Whereas, the other experimental setup included an identical photovoltaic panel that is equipped with a solar tracking system, which enables it to continuously follow the sun trajectories, and keep the orientation of the solar panel at an optimal tilt angle.