Tracking the Sun: Performance Analysis of Single-Axis vs Dual-Axis Solar PV Systems in UAE Desert Climate

In this study, a comparative analysis was conducted for single-axis and dual-axis tracking photovoltaic (PV) systems installed in the Outdoor Test Facility (OTF) at DEWA R&D Center, Dubai UAE. Same type of crystalline modules were installed in both the tracking systems and performance of the two was evaluated based on the daily power output, energy yield, and solar irradiation received. The analysis was conducted using the field data collected for 2 equinox days (March 21, 2018, and September 23, 2018). The results show that the dual-axis tracking system provided higher energy yield by 10.8% for the selected day in March and 8.57% for the selected day in September, compared to the single-axis tracking system. The findings of this study can provide valuable insights for the selection, design and feasibility of the PV tracking systems in desert climates.