Pyranometers and Reference Cells, What's the Difference?: Preprint

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As the photovoltaic industry has grown exponentially in the past decade, large photovoltaic (PV) fields have become more common. The investors for these projects calculate the expected return on investment based on expected electricity generation and adjust the interest rates and other financial terms according to the perceived risk. These calculations usually assume worst case according to the listed warranty and any uncertainty in the measurement is translated directly into a reduced predicted performance. Because a 1% difference in predicted output could represent a large fraction of the expected return on investment, a small reduction in uncertainty translates into a ... continued below

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7 p.

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Meydbray, J.; Emery, K. & Kurtz, S. March 1, 2012.

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As the photovoltaic industry has grown exponentially in the past decade, large photovoltaic (PV) fields have become more common. The investors for these projects calculate the expected return on investment based on expected electricity generation and adjust the interest rates and other financial terms according to the perceived risk. These calculations usually assume worst case according to the listed warranty and any uncertainty in the measurement is translated directly into a reduced predicted performance. Because a 1% difference in predicted output could represent a large fraction of the expected return on investment, a small reduction in uncertainty translates into a much larger value to the entity making investment decisions. To reduce perceived risk in large-scale solar investments power plant performance (or production) guarantees have become increasingly common. This two part article explores some subtleties of accurately measuring PV efficiency in the field.

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7 p.

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  • Related Information: To be published in PV Magazine, April 2012

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  • Report No.: NREL/JA-5200-54498
  • Grant Number: AC36-08GO28308
  • Office of Scientific & Technical Information Report Number: 1038336
  • Archival Resource Key: ark:/67531/metadc829555

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • March 1, 2012

Added to The UNT Digital Library

  • May 19, 2016, 3:16 p.m.

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  • April 6, 2017, 1:16 p.m.

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Meydbray, J.; Emery, K. & Kurtz, S. Pyranometers and Reference Cells, What's the Difference?: Preprint, article, March 1, 2012; Golden, Colorado. (digital.library.unt.edu/ark:/67531/metadc829555/: accessed January 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.