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Pyranometers and reference cells: what's the difference? : preprint

Author: Jenya Meydbray; K Emery; S R Kurtz; National Renewable Energy Laboratory (U.S.),
Publisher: [Golden, Colo.] : National Renewable Energy Laboratory, 2012.
Series: NREL/JA, 5200-54498
Edition/Format:   eBook : Document : National government publication : English
Summary:
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  Read more...
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Genre/Form: Online resources
Material Type: Document, Government publication, National government publication, Internet resource
Document Type: Internet Resource, Computer File
All Authors / Contributors: Jenya Meydbray; K Emery; S R Kurtz; National Renewable Energy Laboratory (U.S.),
OCLC Number: 800109590
Notes: Title from PDF title screen (viewed July 17, 2012).
"March 2012."
"To be published in PV Magazine April, 2012."
Description: 1 online resource (5 pages) : color illustrations
Details: Full text available via internet in .pdf format. Adobe Acrobat Reader required.
Series Title: NREL/JA, 5200-54498
Responsibility: Jenya Meydbray, Keith Emery, and Sarah Kurtz.

Abstract:

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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