JinkoSolar’s unit is suing LONGi in Germany over solar patent EP3297043 related to passivation doping
The patent originally belonged to LG and later acquired by Jinko; it improves solar cell efficiency through selective doping
LONGi and its subsidiaries across Europe have been named in the suit, expanding Jinko’s legal fight geographically
Shangrao Xinyuan Yuedong Technology Development Co., Ltd, a JinkoSolar subsidiary, has filed a patent infringement lawsuit over EP3297043 against LONGi in Munich, Germany.
As per the Unified Patent Court’s (UPC) website, the patent in question here is related to solar cell manufacturing and was filed on June 20, 2025. The patent originally belonged to LG Electronics, later acquired by JinkoSolar. It relates to the selective doping of solar cell passivation, which leads to higher efficiency.
Along with the parent company LONGi Green Energy Technology, its subsidiaries Longi (Netherlands) Trading B.V., LONGi Solar Technologie GmbH, and the European distributor of PV products Energy 3000 solar GmbH have been roped into the lawsuit.
This expands JinkoSolar’s patent lawsuits against its compatriot LONGi in yet another geography. It initially filed the lawsuit in China in January 2025 regarding IP claims related to TOPCon, later taking it to Japan, and then Australia. LONGi hit back with its own lawsuit against JinkoSolar in Texas, US, in February 2025 (see LONGi’s Patent Infringement Lawsuit Against JinkoSolar In US Court).
These lawsuits just expand and elongate the TOPCon patent war that has several other leading names embroiled in it for this new industry workhorse (see Rising IP Disputes Complicate TOPCon Expansion).
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