{"doi":"10.4229/EUPVSEC20202020-4DO.7.2","language":[{"iso":"eng"}],"date_created":"2020-08-27T06:28:42Z","_id":"18390","user_id":"28836","year":"2020","type":"conference","page":"935 - 938","date_updated":"2022-01-06T13:02:11Z","conference":{"end_date":"2020-09-11","location":"online","start_date":"2020-09-07","name":"37th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC 2020)"},"publication_status":"published","publication":"Proceedings of the EUPVSEC 2020","publication_identifier":{"isbn":["\t3-936338-73-6"]},"abstract":[{"text":" Efficiencies and energy yields of microinverters available on the market during 2014‒2020 have been \r\nmeasured, compared, and ranked. Conversion efficiencies as a function of load have been measured indoors with high \r\naccuracy and ranked according to Euro- and CEC weightings. Energy yields have been measured outdoors via \r\nidentical and calibrated crystalline silicon PV modules of 215 Wp each. Inverters with two inputs have been fed by \r\ntwo of those modules. DC input, AC power output and energy yield of each micro-inverter have been recorded by \r\nindividual calibrated electricity meters. Apparently, some inverters have been optimized for high irradiance levels \r\nand ranked better at the CEC efficiency ranking, others performed very well also at low irradiance levels, thus \r\nranking higher at in the EU efficiency ranking. Efficiency ranks are slightly deviating from rankings by energy yield \r\nmeasurements. At one inverter, a slow MPPT algorithm that barely could follow quickly changing irradiance levels is \r\nmost probably responsible for this effect. Another inverter switched off for a while after operation at high power, \r\nanother one failed permanently. Apparently, some inverters are been optimized to show excellent datasheet ratings \r\nfor EU- or CEC- efficiency. On the other hand, two inverters (each featuring two inputs) did not show an outstanding \r\nperformance at the EU- and CEC-ratings but achieved leading ranks for AC energy yields. For the customer, AC \r\nyield is a major performance indicator of a microinverter and should be included in the datasheet.","lang":"eng"}],"department":[{"_id":"53"}],"author":[{"first_name":"Stefan","id":"28836","full_name":"Krauter, Stefan","orcid":"0000-0002-3594-260X","last_name":"Krauter"},{"last_name":"Bendfeld","full_name":"Bendfeld, Jörg","id":"16148","first_name":"Jörg"}],"title":"Micro-Inverters: An Update of Comparison of Conversion Efficiencies and Energy Yields","status":"public","citation":{"apa":"Krauter, S., &#38; Bendfeld, J. (2020). Micro-Inverters: An Update of Comparison of Conversion Efficiencies and Energy Yields. <i>Proceedings of the EUPVSEC 2020</i>, 935–938. <a href=\"https://doi.org/10.4229/EUPVSEC20202020-4DO.7.2\">https://doi.org/10.4229/EUPVSEC20202020-4DO.7.2</a>","short":"S. Krauter, J. Bendfeld, in: Proceedings of the EUPVSEC 2020, 2020, pp. 935–938.","mla":"Krauter, Stefan, and Jörg Bendfeld. “Micro-Inverters: An Update of Comparison of Conversion Efficiencies and Energy Yields.” <i>Proceedings of the EUPVSEC 2020</i>, 2020, pp. 935–38, doi:<a href=\"https://doi.org/10.4229/EUPVSEC20202020-4DO.7.2\">10.4229/EUPVSEC20202020-4DO.7.2</a>.","ama":"Krauter S, Bendfeld J. Micro-Inverters: An Update of Comparison of Conversion Efficiencies and Energy Yields. In: <i>Proceedings of the EUPVSEC 2020</i>. ; 2020:935-938. doi:<a href=\"https://doi.org/10.4229/EUPVSEC20202020-4DO.7.2\">10.4229/EUPVSEC20202020-4DO.7.2</a>","bibtex":"@inproceedings{Krauter_Bendfeld_2020, title={Micro-Inverters: An Update of Comparison of Conversion Efficiencies and Energy Yields}, DOI={<a href=\"https://doi.org/10.4229/EUPVSEC20202020-4DO.7.2\">10.4229/EUPVSEC20202020-4DO.7.2</a>}, booktitle={Proceedings of the EUPVSEC 2020}, author={Krauter, Stefan and Bendfeld, Jörg}, year={2020}, pages={935–938} }","chicago":"Krauter, Stefan, and Jörg Bendfeld. “Micro-Inverters: An Update of Comparison of Conversion Efficiencies and Energy Yields.” In <i>Proceedings of the EUPVSEC 2020</i>, 935–38, 2020. <a href=\"https://doi.org/10.4229/EUPVSEC20202020-4DO.7.2\">https://doi.org/10.4229/EUPVSEC20202020-4DO.7.2</a>.","ieee":"S. Krauter and J. Bendfeld, “Micro-Inverters: An Update of Comparison of Conversion Efficiencies and Energy Yields,” in <i>Proceedings of the EUPVSEC 2020</i>, online, 2020, pp. 935–938, doi: <a href=\"https://doi.org/10.4229/EUPVSEC20202020-4DO.7.2\">10.4229/EUPVSEC20202020-4DO.7.2</a>."}}