Sun Village connected its first owned battery storage facility, the 2MW/8MWh Ashikaga Kariyado Power Storage Station in Ashikaga City, Tochigi Prefecture, to the grid on September 16, 2025, the company announced on October 17, 2025.
According to the statement, the facility will be aggregated by Marubeni Power Retail and used for trading in the wholesale, balancing, and capacity markets. The companies said Ashikaga Kariyado Power Storage Station is the first of four high-voltage assets covered by their contract. Development and engineering, procurement, and construction (EPC) of the project was handled by Sun Village. A planned COD was not disclosed.
The Ashikaga City asset is the fourth high-voltage battery storage facility built by Sun Village following two facilities in the Chubu TSO area and one in the Tokyo TSO area owned by other investors.
The Tochigi-based developer and EPC was founded in 2012 and focused on solar power plants in northern Kanto under the feed-in-tariff (FIT) scheme before expanding into non-FIT solar and grid-scale battery storage projects across a wider geographic area. The company aims to develop and build 250 BESS facilities totaling 500MW.
Prior to signing the aggregation contract, Sun Village and Marubeni Power Retail partnered to offer a turnkey grid-scale storage development and operation solution. They target contracting 100MW within 2025 under the service first announced in July 2025. The tie-up was preceded by a 2 billion yen investment the trading house unit made in the renewable developer and EPC in 2024 under a capital and business alliance on non-FIT solar business.
