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Measurement system including a solar spectrometer for determining PV device efficiency over the whole year.

Meßsystem, mit einem solaren Spectrometer zur Bestimmung von Jahreswirkungsgraden von PV Empfängern
: Raicu, A.; Heidler, K.; Wilson, H.R.

TU Berlin, Institut für Lichttechnik:
Daylight and Solar Radiation Measurement. Proceedings
Berlin/West, 1990
ISBN: 3-900-734-18-6
Daylight and Solar Radiation Measurement <1989, Berlin>
Fraunhofer ISE ()
Jahreswirkungsgrad; Photovoltaik; Sonnenspektrum; spektrale Messung

At the Fraunhofer-Institute for Solar Energy Systems, the spectral distribution of the solar radiation has been measured since 1981. This paper discusses a new measurement stand for determining the influence of the solar spectral distribution, the irradiance level and temperature on the performances of PV devices. Construction, calibration method and measurement examples are given for a filter spectrometer, used in long-term maesurements. Besides the 100 spectral channels the data aquisition system has 15 additional channels which offer the possibility of monitoring theoutput of other devices during the same measurement cycle: the global irradiance, the irradiance in the spectral range above 805 nm, the ambiant temperature, as well as the short circuit current, the current and voltage from at MPP and the temperature of three solarcells or modules. Experimental results these additional channels are also presented.