Degradation of Output Characteristics of a Small Photovoltaic Module Due to Dirt Spots

Konferenz: Intelec '05 - Telecommunications Conference - 27th International Telecommunication Energy Conference
18.09.2005 - 22.09.2005 in Berlin, Germany

Tagungsband: Intelec '05 - Telecommunications Conference

Seiten: 5Sprache: EnglischTyp: PDF

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Kobayashi, Shin-ichi; Iino, Tomonori; Kobayashi, Hironori; Yamada, Kazumasa; Yachi, Toshiaki (Tokyo University of Science, 1-3, Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan)

This paper reports the output degradation characteristics of a small photovoltaic cell when a dirt spot adheres to the surface. The 11 W photovoltaic module GT434 was applied to various electric systems. The module consists of 34 cells, cut to 1/4 the silicon single crystal photovoltaic cell of a square with one side measuring 103 mm. The photovoltaic output power was found to be reduced by 50% when a 3% dirt area was applied to the small module. The decrease in output power was shown to improve when the shape of the photovoltaic cell was changed.