The project entails the installation of a battery energy storage system that has a rated output of about 30MW and a capacity of about 125MWh, and is currently Japan's greatest solar energy co-located battery energy storage system, as it positively impacts two of. . The project entails the installation of a battery energy storage system that has a rated output of about 30MW and a capacity of about 125MWh, and is currently Japan's greatest solar energy co-located battery energy storage system, as it positively impacts two of. . Sonnedix Japan has brought online just under 500MW of solar PV in the country. Utility Osaka Gas and developer Sonnedix are installing a battery energy storage system (BESS) at the latter's 38. (President: Masataka Fujiwara, hereinafter “Osaka Gas”) has acquired a 40% stake in each of three solar power plants in Japan (hereinafter, “the power plants”) operated by companies owned by Sonnedix Power Holdings Limited (CEO: Axel Thiemann, hereinafter “Sonnedix”), a global. . Osaka Gas and international renewable energy firm Sonnedix have collaborated on this revolutionary energy infrastructure project that is currently underway in Oita City, located within Oita Prefecture. By coming together, these two firms have managed to tap into each other's expertise, as Osaka Gas. .