RPN analysis of field exposed mono crystalline silicon PV modules under composite climate of India

Performance reliability and degradation of 190 mono-crystalline PV modules from 9 different manufactures after 16 years in a power plant with fixed tilt configuration under composite climate of India have been evaluated. The dominant failure mode of PV module in the climate zone is found by using a statistical reliability tool, FMECA. Main objective of this study is to do RPN analysis of 25 different defects observed in these PV modules. It is found that for mono-crystalline silicon modules, under composite climate of India, string interconnect defect of solar cell is found to be dominant failure mode.