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Pat. 9917443 United States, Int. Cl.22 H02J 3/38, H02M 7/5387. Photovoltaic system and method for operating a photovoltaic system for feeding electrical power into a medium-voltage network : Appl. N 14/535462 : Filed 07.11.2014 : Pub. 13.03.2018 : / Andreas Falk, Bernhard Beck, Aaron Philipp Gerdemann, Frank Niebling ; Assignee Sma Solar Technology Ag, Adensis Gmbh ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US9917443/en?oq=US9917443.html (дата обращения: ДД.ММ.ГГГГ).