Thermal Characteristics of PID-Affected Monocrystalline Silicon Solar Modules under Illuminated and Dark Conditions

This paper focuses on thermal characteristics of PID-affected solar modules under illuminated and dark conditions by thermographic images. It is found that the temperature of PID-affected module becomes higher under negative bias when the sequence of module approaches to negative pole of module string. The thermal distribution under dark conditions shows that substrings neighboring the module frame yield more serious degradation than the middle substring within the PID-affected module. The results obtained under illuminated and dark conditions can reflect the regular power loss for PID-affected solar modules.