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Durable PV Modules - Requirements for the Module Design and Aspects of Reliability Testing Techniques
G. Mathiak, W. Herrmann, F. Reil, A. Morlier, S. Großer, M. Pander, S. Schindler, M. Turek, M. Ebert
Qualification and Testing, Module Reliability, EVA, PERC Cell, Polyolefin, Long sequential testing
Photovoltaic Modules and BoS Components
Subtopic: PV Module Design, Manufacture, Performance and Reliability
Event: 36th European Photovoltaic Solar Energy Conference and Exhibition
Session: 4BO.13.2
835 - 843
ISBN: 3-936338-60-4
Paper DOI: 10.4229/EUPVSEC20192019-4BO.13.2
0,00 EUR
Document(s): paper


The aim of this work was to develop a PV module design with current components that is resistant to degradation mechanisms without increasing costs. A glass–foil module design with a 4 mm thick front glass with antireflective coating was chosen. The encapsulation material was varied (polyolefin and EVA from two manufacturers). The two test module series have different PERC cell types (multicrystalline with three busbars and monocrystalline with five busbars). We have developed a long sequential test sequence to evaluate the reliability of the modules according to the selected degradation modes. The test sequence included damp heat (3000 h), thermal cycling (200x) and UV light exposure (60 kWh/m²) with hail and mechanical stress testing. The performance of the polyolefin modules was better after the long test sequence. The second module series was better due to the better cells.