Monitoring of Photovoltaic System Performance Using Outdoor Suns-VOC

Alexander C. Killam, Joseph F. Karas, André Augusto, Stuart G. Bowden

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Photovoltaics (PVs) have rapidly grown due to advancements in efficiency and cost. PV is projected to increase to 48% of all renewable generation by 2050, making it the fastest growing source of energy generation. More emphasis has been placed on reliability, as a path to reducing LCOE by improving degradation rates and system lifespans. We capitalize on Suns-VOC, which is widely used for laboratory measurements of single solar cells, and discuss the barriers in extending the technique to outdoor systems of all sizes. The resulting data can provide a thorough analysis of impeding faults and degradation. Because Suns-VOC is rather simple to implement on fielded systems, it can be a valuable tool for collecting the data needed to better understand how degradation mechanisms and climates impact different PV architectures. This work provides a scalable pathway to provide the industry with the information needed to achieve PV lifespans of beyond 50 years.

Original languageEnglish (US)
Pages (from-to)210-227
Number of pages18
Issue number1
StatePublished - Jan 20 2021


  • Suns-V
  • degradation
  • fill factor
  • outdoor characterization
  • performance monitoring
  • photovoltaics
  • power
  • pseudo parameters
  • reliability
  • temperature normalization

ASJC Scopus subject areas

  • Energy(all)


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