Long-term power degradation analysis of crystalline silicon PV modules using indoor and outdoor measurement techniques

Carigiet F, Brabec C, Baumgartner FP (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Renewable and Sustainable Energy Reviews

Book Volume: 144

Article Number: 111005

DOI: 10.1016/j.rser.2021.111005

Abstract

Annual degradation rates of PV modules are important in the yield prediction. For a high-quality PV module, these rates are lower than the measurement uncertainty of a nominal power measurement performed in todays most advanced certified photovoltaic reference laboratory. Therefore, the analysis requires a well thought out methodology that can compare the data relative to each other or relative to an unused module stored in the dark on an annual base. Over the past 10 years, several multi c-Si and HIT modules have been accurately monitored in a string and single module setup by an outdoor performance measurement system. Additionally, all modules have been dismantled and measured using an indoor flasher measurement system once every year. With this unique measurement setup, the annual degradation rates of multi c-Si modules and HIT modules are quantified based on three different analysis methodologies. The multi c-Si modules showed an average annual degradation rate of 0.18% ± 0.06% and 0.29% ± 0.06% measured by the outdoor and indoor system, respectively. The indoor analysis of the HIT modules yielded an average annual degradation of 0.26% ± 0.05%. That corresponds to half of the degradation observed by the outdoor analysis method. Further evaluations of the performance ratio PR confirmed the results gained by the indoor methodology. The comparison of the standard PR with a temperature-corrected PR’STC for both technologies showed that the benefit of the lower temperature coefficient of the HIT technology is eliminated by its worse low light behaviour.

Authors with CRIS profile

Christoph Brabec Institute Materials for Electronics and Energy Technology (i-MEET)

Involved external institutions

Zürcher Hochschule für Angewandte Wissenschaften (ZHAW) CH Switzerland (CH)

How to cite

APA:

Carigiet, F., Brabec, C., & Baumgartner, F.P. (2021). Long-term power degradation analysis of crystalline silicon PV modules using indoor and outdoor measurement techniques. Renewable and Sustainable Energy Reviews, 144. https://dx.doi.org/10.1016/j.rser.2021.111005

MLA:

Carigiet, Fabian, Christoph Brabec, and Franz P. Baumgartner. "Long-term power degradation analysis of crystalline silicon PV modules using indoor and outdoor measurement techniques." Renewable and Sustainable Energy Reviews 144 (2021).

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