Methods for Analysis of Outdoor Performance Data (Presentation): NREL (National Renewable Energy Laboratory)

Research output: NRELPresentation


The ability to accurately predict power delivery over the course of time is of vital importance to the growth of the photovoltaic (PV) industry. Two key cost drivers are the efficiency with which sunlight is converted to power and secondly how this relationship develops over time. The accurate knowledge of power decline over time, also known as degradation rates, is essential and important to allstakeholders--utility companies, integrators, investors, and scientists alike. Different methods to determine degradation rates and discrete versus continuous data are presented, and some general best practice methods are outlined. In addition, historical degradation rates and some preliminary analysis with respect to climate are given.
Original languageAmerican English
Number of pages37
StatePublished - 2011

Publication series

NamePresented at the 2011 Photovoltaic Module Reliability Workshop, 16-17 February 2011, Golden, Colorado

NREL Publication Number

  • NREL/PR-5200-51120


  • degradation rate
  • outdoor measurements
  • outdoor testing
  • performance
  • photovoltaics (PV)
  • PV


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