Modeling a grid-connected concentrator photovoltaic system

Ehud Strobach, David Faiman, Shlomo Kabalo, Dov Bokobza, Vladimir Melnichak, Andreas Gombert, Tobias Gerstmaier, Michael Röttger

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


A six-parameter formula is proposed for describing the hourly alternating current performance of a grid-connected, passively cooled concentrator photovoltaic (CPV) system. These system parameters all have physical meanings, and techniques are described for deriving their numerical values. The predictions of the model are compared with the measured output of a Soitec CPV system at Sede Boqer and found to be accurate to approximately-±-5% at all times of the year. The model should also be valid for systems of similar construction operated in different climates from the system studied here, and also for passively cooled CPV systems of different designs provided that suitable numerical values are determined for their system parameters. Another possible use of the model is as a guide for tailoring CPV cell architecture to the particular spectral conditions of the locations in which they will operate. Attention is drawn to the fact that the numerical values of some of the system parameters are found to depend upon the time binning employed for the data. An explanation is given for this phenomenon, which is also found to occur for non-concentrating photovoltaic panels.

Original languageEnglish
Pages (from-to)582-592
Number of pages11
JournalProgress in Photovoltaics: Research and Applications
Issue number5
StatePublished - 1 May 2015


  • CPV
  • air mass
  • heat loss coefficients
  • modeling
  • outdoor characterization
  • photovoltaic

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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