Paper Title
Obtaining Maximum Radiation by Determining Optimum Tilt Angles in Large-Scale Grid-Connected PV Plants, Efficiency Analysis of Solar Tracking Systems: A Case Study for Sanliurfa, Turkey

Abstract
Photovoltaic (PV) plants have improved in cost and performance over the previous decade, making them a viable primary energy source. Scientists and solar engineers have recently focused their efforts on determining optimum tilt angles and maximizing solar radiation in PV energy systems. The tilt angle and orientation of any PV surface, as well as the manufacturing features and technologies used, have a significant impact on the amount of solar radiation collected. Therefore, the performance of fixed-axis, one-axis, and two-axis solar tracking systems is investigated in this study using NASA's climatic and latitude data to obtain maximum solar radiation in Sanliurfa. The findings show that the optimum tilt angles for the annual-fixed solar system are found to range between 29° and 30° of the districts of Sanliurfa province. It is also reached that the one-axis tracking system collects roughly 31% more solar radiation than the fixed-axis system in Sanliurfa while the two-axis tracking system collects roughly 35% more. Keywords - Solar, Sanliurfa, Tilt,Radiation, Tracking, Angle, Optimum, PV