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Proceedings Paper

Indoor and outdoor weathering of PV-modules
Author(s): Michael Koehl; Markus Heck; Daniel Philipp; Karl-Anders Weiss; Claudio Ferrara; Werner Herrmann
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Paper Abstract

Manufacturers of PV-modules usually give a warranty for at least 20 years. There is still only little knowledge about the lifetime of newly developed modules, however. How do they cope with snow, desert-climate or tropical humidity? In order to answer this question the Fraunhofer-Institute for Solar Energy Systems and TUV Rheinland have installed different outdoor exposure sites where modules have to stand extreme climates: high temperatures with high differences between day and night in the Negev desert at Israel, snow, wind and changing irradiation in the German Alps, and high humidity at warm temperatures at Indonesia. Commercial modules from industrial partners as well as innovative modules with different combinations of encapsulants and back-sheets were exposed. UV-irradiation, solar-irradiation, ambient- and module temperatures, ambient humidity and wind speed is measured and collected at a central server in Germany. These data are the basis for the calculation of integral loads for the comparison of different climatic regions and for an estimation of the service life, an exciting field of work since decades. Results from the evaluation of the monitoring during the fist 12 months of exposure are compared. Fluorescent lamps are chosen for accelerated UV-testing, since they simulate the UV-irradiation of the sun well while emitting less thermal radiation than Xenon-lamps. The UV-source is designed for use in climatic cabinets for damp-heat testing with UV.

Paper Details

Date Published: 10 September 2008
PDF: 8 pages
Proc. SPIE 7048, Reliability of Photovoltaic Cells, Modules, Components, and Systems, 704806 (10 September 2008); doi: 10.1117/12.794569
Show Author Affiliations
Michael Koehl, Fraunhofer ISE (Germany)
Markus Heck, Fraunhofer ISE (Germany)
Daniel Philipp, Fraunhofer ISE (Germany)
Karl-Anders Weiss, Fraunhofer ISE (Germany)
Claudio Ferrara, TUV Rheinland (Germany)
Werner Herrmann, TUV Rheinland (Germany)

Published in SPIE Proceedings Vol. 7048:
Reliability of Photovoltaic Cells, Modules, Components, and Systems
Neelkanth G. Dhere, Editor(s)

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