Elevated Temperatures Affecting Efficiency, Overall Performance and Energy Yield of PV Microinverters

S. Krauter, J. Bendfeld, in: Proceedings of the EU PVSEC 2020 , 2020, pp. 1179–1180.

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Conference Paper | Published | English
Abstract
During comparative measurements of different PV microinverters, two yield issues came up that could not be explored via conventional efficiency measurements, but do have a significant impact on electrical energy yield: First category of issues are either sluggish or nervously acting maximum–power–point–tracking devices, which lead to reduced energy yields. The other category of issues is thermal: As a first explanation for observed reduced energy yields, it has been assumed that the conversion efficiency degrades at higher operating temperatures. This matter has been investigated in this article: A change in conversion efficiency could not be observed for elevated operation temperatures up to 50°C, despite high-precision and repeated measurements. But it was found that some inverters temporarily interrupted (or entirely stopped) operation after long periods of running at high temperatures. Also, a reduction in potential maximum power output has been detected for those inverters. Summarizing: With a high degree of certainty it can be stated that those reported yield losses have been caused by the temporary shutdowns and power limitations of the inverters.
Publishing Year
Proceedings Title
Proceedings of the EU PVSEC 2020
Page
1179 - 1180
Conference
EU PVSEC 2020, 37th EU Photovoltaik Solar Energy Conference
Conference Location
online
Conference Date
2020-09-07 – 2020-09-11
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Krauter S, Bendfeld J. Elevated Temperatures Affecting Efficiency, Overall Performance and Energy Yield of PV Microinverters. In: Proceedings of the EU PVSEC 2020 . ; 2020:1179-1180. doi:10.4229/EUPVSEC20202020-4AV.3.6
Krauter, S., & Bendfeld, J. (2020). Elevated Temperatures Affecting Efficiency, Overall Performance and Energy Yield of PV Microinverters. Proceedings of the EU PVSEC 2020 , 1179–1180. https://doi.org/10.4229/EUPVSEC20202020-4AV.3.6
@inproceedings{Krauter_Bendfeld_2020, title={Elevated Temperatures Affecting Efficiency, Overall Performance and Energy Yield of PV Microinverters}, DOI={10.4229/EUPVSEC20202020-4AV.3.6}, booktitle={Proceedings of the EU PVSEC 2020 }, author={Krauter, Stefan and Bendfeld, Jörg}, year={2020}, pages={1179–1180} }
Krauter, Stefan, and Jörg Bendfeld. “Elevated Temperatures Affecting Efficiency, Overall Performance and Energy Yield of PV Microinverters.” In Proceedings of the EU PVSEC 2020 , 1179–80, 2020. https://doi.org/10.4229/EUPVSEC20202020-4AV.3.6.
S. Krauter and J. Bendfeld, “Elevated Temperatures Affecting Efficiency, Overall Performance and Energy Yield of PV Microinverters,” in Proceedings of the EU PVSEC 2020 , online, 2020, pp. 1179–1180, doi: 10.4229/EUPVSEC20202020-4AV.3.6.
Krauter, Stefan, and Jörg Bendfeld. “Elevated Temperatures Affecting Efficiency, Overall Performance and Energy Yield of PV Microinverters.” Proceedings of the EU PVSEC 2020 , 2020, pp. 1179–80, doi:10.4229/EUPVSEC20202020-4AV.3.6.
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