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Title: Suggested Modifications for Bifacial Capacity Testing: Preprint

Abstract

Capacity tests such as those described in ASTM 2848 and IEC 61724-2 are widely used during the contracting and acceptance testing of PV systems. With the increasing deployment of bifacial PV modules, there is a need to develop a standardized approach to capacity test these systems. Although variability and bias error was inherently higher for the measured capacity of bifacial systems, it could be reduced to a level consistent with the monofacial reference system by appropriate incorporation of rear irradiance- either measured or modeled. Three field installations provided bifacial system capacity that was measured with a mean bias error and standard deviation within 1% over the 2-10 month observation period. Capacity test accuracy could be improved further by utilizing measured back-of-module temperature and the IEC 61724-2 test method.

Authors:
 [1]; ORCiD logo [2];  [1];  [1]
  1. Cypress Creek Renewables
  2. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)
OSTI Identifier:
1570184
Report Number(s):
NREL/CP-5K00-73982
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: Presented at the 46th IEEE Photovoltaic Specialists Conference (PVSC 46), 16-21 June 2019, Chicago, Illinois
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; capacity test; bifacial photovoltaics; IEC 61724-2; ASTM 2848

Citation Formats

Waters, Martin, Deline, Christopher A, Kemnitz, Johan, and Webber, Jeffrey. Suggested Modifications for Bifacial Capacity Testing: Preprint. United States: N. p., 2019. Web.
Waters, Martin, Deline, Christopher A, Kemnitz, Johan, & Webber, Jeffrey. Suggested Modifications for Bifacial Capacity Testing: Preprint. United States.
Waters, Martin, Deline, Christopher A, Kemnitz, Johan, and Webber, Jeffrey. Mon . "Suggested Modifications for Bifacial Capacity Testing: Preprint". United States. https://www.osti.gov/servlets/purl/1570184.
@article{osti_1570184,
title = {Suggested Modifications for Bifacial Capacity Testing: Preprint},
author = {Waters, Martin and Deline, Christopher A and Kemnitz, Johan and Webber, Jeffrey},
abstractNote = {Capacity tests such as those described in ASTM 2848 and IEC 61724-2 are widely used during the contracting and acceptance testing of PV systems. With the increasing deployment of bifacial PV modules, there is a need to develop a standardized approach to capacity test these systems. Although variability and bias error was inherently higher for the measured capacity of bifacial systems, it could be reduced to a level consistent with the monofacial reference system by appropriate incorporation of rear irradiance- either measured or modeled. Three field installations provided bifacial system capacity that was measured with a mean bias error and standard deviation within 1% over the 2-10 month observation period. Capacity test accuracy could be improved further by utilizing measured back-of-module temperature and the IEC 61724-2 test method.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {10}
}

Conference:
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