PERFORMANCE INTERCOMPARISON OF 13 DIFFERENT PV MODULES BASED ON INDOOR AND OUTDOOR TESTS

Friesen, Gabi and Strepparava, Davide and Chianese, Domenico and Dittmann, Sebastian and Domine, Didier (2010) PERFORMANCE INTERCOMPARISON OF 13 DIFFERENT PV MODULES BASED ON INDOOR AND OUTDOOR TESTS. UNSPECIFIED. In: 5th World PVSEC Conference, Valencia (Spain).

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Abstract

At the begin of 2009 the ISAAC institute started a new measurement campaign investigating thirteen different modules commercially available on the market. Two modules of each type have been exposed outdoors for energy yield monitoring and a third module has been stored indoors as a reference. The modules covers a large range of different technologies ranging from multi-crystalline silicon (mc-Si) of which two with back-contact cells, 3 single-crystalline silicon (sc-Si), 1 hybrid mono-crystalline technology with amorphous silicon layer (HIT), 1 double junction amorphous silicon (a-Si/a-Si), 1 micromorph (a-Si/μc-Si), 1 Cupper-Indium-Sulfide (CIS) and 1 Cupper- Indium-Gallium-Diselenide (CIGS). The aim of the measurement campaign is to assess the quality of current technologies and the understanding of observed differences between technologies. Outdoor and indoor performance of the modules are analysed over 15 months performing measurements under real operating conditions, regular STC and low irradiance indoor testing with a solar simulator to determine stability of the devices over time and the relation between indoor performance and outdoor yield. The modules are therefore installed on a ventilated rack where each single module is connected to a maximum power point tracker delivering Im, Vm values in minutes intervals. The annual energy output in kWh/Wp is measured and the differences between various module technologies or modules of the same technology is analysed, by quantifying the influence of the temperature coefficient, the low irradiance performance measured indoors, the module temperature as well as all measurement related uncertainties.

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