Daiwa Energy & Infrastructure selected TESS Engineering to provide engineering, procurement, and construction (EPC) services for its 24.9MW/100.3MWh grid-scale battery storage project in Nishiki Town, Kumamoto Prefecture.
The EPC’s parent TESS Holdings disclosed on April 15, 2025, that the contract is worth about 4 billion yen. Construction is scheduled for completion in December 2027.
Originally developed by a special purpose company (SPC) affiliated with the China-based battery manufacturer Gotion, the project was sold to Daiwa Energy & Infrastructure’s SPC DEI Battery Fund Alpha LLC earlier this year under a partnership formed in March 2024 between the two companies and CO2OS, a technical consulting and operation and maintenance (O&M) services provider.
Daiwa Energy & Infrastructure plans to task CO2OS with O&M and Daiwa Real Estate Asset Management with asset management of the facility once operational. The company is targeting 2028 COD.
In addition to the partnership with Gotion and CO2OS, which aims to install 1GWh of the manufacturer’s battery systems in Japan within two years, Daiwa Energy & Infrastructure also signed a memorandum of understanding with TESS Holdings under which the two companies aim to commit to 2GWh of grid-scale BESS projects within three years.
Daiwa Energy & Infrastructure has also been active in BESS, having invested in a 50MW/100MWh facility planned to be commissioned in Hokkaido at the end of October 2025 jointly with Fuyo General Lease and Astmax.
Unlike smaller developers that mainly work on high-voltage 2MW/8MWh-scale projects, Daiwa Energy & Infrastructure is focusing on extra high-voltage projects that require substantial resources to develop.
