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Title: A side-by-side comparison of CPV module and system performance

A side-by-side comparison is made between concentrator photovoltaic module and system direct current aperture efficiency data with a focus on quantifying system performance losses. The individual losses measured/calculated, when combined, are in good agreement with the total loss seen between the module and the system. Results indicate that for the given test period, the largest individual loss of 3.7% relative is due to the baseline performance difference between the individual module and the average for the 200 modules in the system. A basic empirical model is derived based on module spectral performance data and the tabulated losses between the module and the system. The model predicts instantaneous system direct current aperture efficiency with a root mean square error of 2.3% relative.
 [1] ;  [1] ;  [1] ;  [2] ;  [2] ;  [3] ;  [3]
  1. National Renewable Energy Laboratory, Golden CO USA
  2. Semprius, Inc., 4915 Prospectus Drive, Suite C Durham NC 27713 USA
  3. Electric Power Research Institute, 3420 Hillview Ave. Palo Alto CA 94304 USA
Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 1062-7995
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Progress in Photovoltaics; Journal Volume: 24; Journal Issue: 7
Research Org:
NREL (National Renewable Energy Laboratory (NREL), Golden, CO (United States))
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)
Country of Publication:
United States
14 SOLAR ENERGY; 47 OTHER INSTRUMENTATION concentrator PV; CPV system; derates; performance losses