Understanding PID in Solar PV Systems: Causes, Effects & Solutions
Learn how PID affects solar PV systems, its causes and effects, and proven solutions to boost solar panel efficiency and energy output.
Understanding PID in Solar PV Systems: Causes, Effects & Solutions
Potential Induced Degradation (PID) is one of the most critical issues affecting solar photovoltaic (PV) systems today. It occurs when a voltage potential between a solar module’s cells and its grounded frame triggers leakage currents, causing ion migration and gradual performance loss. Over time, PID can reduce the energy output of PV modules by 20–30%, negatively impacting both utility-scale and residential solar installations. Understanding PID is essential for PV engineers, system operators, and homeowners aiming to maintain optimal solar panel efficiency. This comprehensive article explains the causes and effects of PID, provides methods for detection, outlines proven mitigation strategies, and shares real-world examples. Additionally, an FAQ section addresses common concerns to provide actionable insights for maintaining long-term PV performance. What is PID? Potential Induced Degradation (PID) is the deterioration of solar module performance caused by unwanted leakage currents wit…
About the author
Prasun Barua is a graduate engineer in Electrical and Electronic Engineering with a passion for simplifying complex technical concepts for learners and professionals alike. He has authored numerous highly regarded books covering a wide range of elec…
