SPLTRAK Abstract Submission
Impacts of Nonuniform Soiling on Photovoltiac Production
Lin J. Simpson1, Ian K. Teague2, Jody Ford3, Nathan Shih4, Mahfujur Rahman5, Jorge I. T. Marchand3, Kirsten Perry1, Chris Deline1
1National Renewable Energy Laboratory, Golden, CO, United States
/2Monroe Community College, Rochester, NY, United States
/3Red Rocks Community College, Lakewood, CO, United States
/4Bellevue Community College, Bellevue, WA, United States
/5City University of New York Queensborough, New York, NY, United States

Even though soiling of photovoltaic (PV) modules can substantially reduce power production, cost effective mitigation remains a challenge. The differences in soiling type, environmental conditions, and module properties all contribute to substantial soiling variability between sites and even within sites. Here, we develop tools to evaluate the production data from individual modules and observe specific incidences where nonuniform soiling produces an imbalance of light throughput resulting in a “hot cell” which induces a module string diode to shut down power delivery from that cell string. Thus, demonstrating that even a small amount of nonuniform soiling can substantially reduce power production.