The Okinawa Yanbaru Seawater Pumped Storage Power Station was an experimental hydroelectric power station located in Kunigami, Okinawa, Japan, operated by the Electric Power Development Company. It was the world's first pumped-storage facility to use seawater for storing energy. . China has brought a 1 GW offshore solar power plant online off the coast of Dongying, Shandong province, combining PV with energy storage and aquaculture in what is now the world's largest open-sea solar project in commercial operation. The facility consists of steel truss platforms on bottom-fixed piles. Just in the past month, the state-owned company commissioned solar power plants. . But when China National Offshore Oil Corporation (CNOOC) starts turning ships into "hybrid athletes" and islands into smart microgrids, even Elon Musk might raise an eyebrow. Developed by Guohua Investment, a unit of China Energy Investment Corp (CHN Energy), a state-owned. . (worldkings. org) Constructed by the Electric Power Development Company (J-POWER), the plant commenced operations on May 16, 1999.