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Comparison of Optical Gains and Electrical Losses in Modules with Different Designs of Partial Cells in Desert Regions

: Hanifi, Hamed; Daßler, David; Turek, Marko; Schneider, Jens; Bagdahn, Jörg


Smets, A.:
33rd European Photovoltaic Solar Energy Conference and Exhibition, EU PVSEC 2017 : Proceedings of the international conference held in Amsterdam, The Netherlands, 25 September - 29 September 2017
München: WIP, 2017
ISBN: 978-3-936338-47-8
ISBN: 3-936338-47-7
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <33, 2017, Amsterdam>
Conference Paper
Fraunhofer IMWS ()
PV module; desert module; partial cells; half-cell module; third-cell module

Modules with partial cells have shown better performance compared to full-cell modules due to reduced electrical losses and increased optical gains. In this paper, we have compared different module concepts of full-cell, half-cell and third-cell with different tab widths of 0.8 mm and 1.5 mm in moderate and desert conditions. First, we present the statistical evaluation of indoor measurements results of the modules. The modules were measured with a mask which limits the spacing of the cells and keeps the total inactive area of the mini-modules constant. The efficiency and fill factor of the modules are evaluated to analyze the electrical and optical losses of the modules. We show that the modules with partial cells show better fill factor and efficiency compared to the similar full-cell modules. The modules were measured under different irradiation levels to evaluate the performance of the modules under different light conditions. Based on the measured data, the energy yields of the modules are simulated in Morocco and Germany as desert and moderate climates. We show that extra energy yield can be harvested by choosing the module concept and optimized tab width for each climate. The optimized half-cell modules benefit of 4.12% and 4.97% extra annual energy yield compared to full-cell modules in moderate and desert climates correspondingly. These values increase respectively by transition to third-cell modules to 5.2% and 5.68% at moderate and desert environments.