Neoen Invests in 100 MW/400 MWh Ako Battery Project in Japan

Neoen has announced its first investment in the 100 MW/400 MWh Ako Battery project in Japan. Neoen is collaborating with French company Equans and Japanese company Toho on this project and obtained a grid connection agreement with the network operator, Kansai Electric Power Company (KEPCO) in January 2026.

Ako is a 4-hour long duration battery that will actively support the Japanese grid, enhancing stability and resilience. The notice to proceed is expected in the coming months, and the battery is scheduled to be operational in 2028, the company stated.
Xavier Barbaro, Group CEO of Neoen, said, “As a pioneer in battery storage, Neoen is extremely proud to be announcing Ako Battery, our first investment in Japan and a major step in our expansion in the region. This achievement is impressive both in its scale and the speed of its delivery. Our team in Tokyo is fully dedicated to contributing our storage expertise to help strengthen Japan’s energy security and accelerate its energy transition.”

Neoen is active in 15 countries across 3 regions Europe, the Americas and Australia Pacific, the latter including Australia, Japan and New Zealand.

The company has a portfolio of big batteries totalling 2.3 GW/7.2 GWh in operation or under construction in Australia. On a global scale, Neoen’s storage capacity spans 7 countries, including Australia, Finland, France, Germany, Italy, Sweden and El Salvador, with 2.8 GW/8.1 GWh of batteries in operation or under construction.