Phase deviations can result from:Uneven loading on the phases, Poorly balanced distribution transformers, Nearby industrial equipment, Grid reconfiguration or maintenance events. Abstract—In the 2021 Texas Odessa large-scale solar PV tripping events, phase-locked-loop (PLL) loss of synchronism is identified as a major cause of solar PV tripping. When solar PVs detected a large phase angle deviation (e. The large phase angle. This article explains the main grid-related sensitivities of rooftop PV systems, why they matter, and how small deviations can lead to large energy losses if left untreated. A solar array rooftop with grid lines in the background. This extensive portfolio necessitates a to l for fast, accurate and customer-oriented device modeling.