Long-Term Performance of the SERF PV Systems

Research output: Contribution to conferencePaper


This paper provides the changes in performance ratings of two photovoltaic (PV) systems located on the roof of the Solar Energy Research Facility (SERF) building at the National Renewable Energy Laboratory (NREL) in Golden, Colorado. For the period of May 1994 to April 2002, the performance rating of the two PV systems decreased at the rate of 1% per year. Most of the changes in performancerating are attributed to changes in the performance of the PV arrays. But about a fifth of the observed changes were from the inverter not tracking the peak-power as effectively as the PV arrays aged.
Original languageAmerican English
Number of pages6
StatePublished - 2003
EventNational Center for Photovoltaics (NCPV) and Solar Program Review Meeting - Denver, Colorado
Duration: 24 Mar 200326 Mar 2003


ConferenceNational Center for Photovoltaics (NCPV) and Solar Program Review Meeting
CityDenver, Colorado

NREL Publication Number

  • NREL/CP-520-33531


  • inverter
  • peak-power tracking
  • performance rating
  • photovoltaic systems
  • PV array
  • SERF


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