ALEXANDRIA, Va., July 15 -- United States Patent no. 12,665,412, issued on June 23, was assigned to Huawei Digital Power Technologies Co. Ltd. (Shenzhen, China).

"Photovoltaic system, direct-current combiner box, and fault isolation method" was invented by Fangpo Zhang (Shanghai), Tiansan Lin (Shenzhen, China), Xiufeng Zhang (Dongguan, China) and Jinxiang Zhan (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "This application discloses a photovoltaic system, a direct-current combiner box, and a fault isolation method. The photovoltaic system includes a fault isolation circuit and a DC/DC conversion circuit. A first end of the fault isolation circuit is connected to N photovoltaic strings, and a second...