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Proceedings Paper

Comparison of environmental degradation in Hanwha 295 W and SunPower 320 W photovoltaic modules via accelerated lifecycle testing
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Paper Abstract

Lifecycle testing of full-scale photovoltaic (PV) modules was conducted in a large-sized, accelerated-degradation chamber in our labs that enables full-solar-spectrum irradiance, temperature, and humidity control. In-situ measurement of both polycrystalline and monocrystalline silicon PV module energy conversion characteristics were examined under environmental lifecycle conditions representative of Tucson, AZ. Specifically, the performance degradation of a Hanwha 295 W polycrystalline PV module and of a SunPower 320 W monocrystalline PV module were evaluated and compared. Results indicate that the initial efficiency of the polycrystalline module and the subsequent annual degradation occurred within expected ranges for that system. In contrast, the single-crystal module exhibited both a significant decrease in PV module efficiency during the test cycle, and early evidence of environmentally-induced materials degradation across the module. The temperature and time-dependence of PV module behavior were extracted to provide insight into early-stage performance degradation under conditions approximating field-relevant environments.

Paper Details

Date Published: 8 October 2014
PDF: 9 pages
Proc. SPIE 9179, Reliability of Photovoltaic Cells, Modules, Components, and Systems VII, 917908 (8 October 2014); doi: 10.1117/12.2062205
Show Author Affiliations
R. Biggie, The Univ. of Arizona (United States)
T. Lai, The Univ. of Arizona (United States)
W.-J. Huang, The Univ. of Arizona (United States)
B. G. Potter Jr., The Univ. of Arizona (United States)
K. Simmons-Potter, The Univ. of Arizona (United States)

Published in SPIE Proceedings Vol. 9179:
Reliability of Photovoltaic Cells, Modules, Components, and Systems VII
Neelkanth G. Dhere, Editor(s)

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