Title: Comparison of Indoor and Outdoor Performance Measurements of Recent Commercially Available Solar Modules
Authors: VIRTUANI ALESSANDROMUELLEJANS HARALDPONTI FrancescoDUNLOP Ewan
Citation: Proceedings of the 23rd PVSEC p. 2713-2718
Publisher: WIP - Renewable Energy
Publication Year: 2008
JRC N°: JRC43705
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC43705
Type: Contributions to Conferences
Abstract: The strong increase of the PV market is nowadays accompanied by an increasing number of ¿new¿ technologies and concepts now mature for commercialization. A correct calibration of these devices is in some cases very difficult, because indoor and outdoor performance measurements often lead to different results. In this paper we compare the indoor and outdoor performance measurements of a set of recent commercially available PV modules, (conventional and high-efficiency c-Si, single junction, double and triple junction thin film technologies) and we observe that the maximum power Pmax of some devices measured indoors using our large area pulsed solar simulator are systematically lower than the power measured outdoors under natural sunlight. The major effects which lead to these discrepancies are identified, as follows: a) spectral mismatch errors, very significant for CdTe, and all a-Si thin film technologies; b) measurement-related sweep-time effects, which seem to strongly influence the performance of high efficiency c-Si devices and to a lesser extend of all a-Si thin film technologies; and c) short-time light soaking effects, which influence the performance of CIS and to a lesser extent CdTe.
JRC Institute:Institute for Energy and Transport

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