Gaining Fundamental Understanding of Critical Failure Modes and Degradation Mechanisms in Fielded Photovoltaic Modules via Multiscale Characterization

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This project applies multiscale characterization methods to field exposed photovoltaic (PV) modules to link observed performance degradation to specific loss mechanisms and, ultimately, to root causes. This research will be carried out on a large and diverse population of modules to ensure statistical relevance. The team will perform multiple iterations of down-selection beginning with large-scale analysis of time-series, current-voltage data, followed by the application of both traditional and more novel on-site characterization methods. The analysis will be used to select modules for further characterization in a controlled lab setting, then to make assessments on the most likely root cause of the observed failure modes and degradation mechanisms. From those modules, individual regions of interest will be identified for targeted materials characterization to provide final confirmation of the root cause.