RS Technologies (TYO:3445) will invest 8.04 billion yen for a 49% stake-in a grid-scale battery energy storage project in Otawara City, Tochigi Prefecture, through a silent partnership in special purpose company GK CDH JAPAN BESS4.
The project, with total investment of about 16.4 billion yen, features a rated output of 99.82 MW and approximately 400 MWh storage capacity, equivalent to the daily electricity usage of roughly 35,000 households.
Capital contributions are scheduled in stages from August 2026 through August 2029, with commercial operations planned to commence in October 2029.
The initiative addresses growing power supply-demand balancing needs amid renewable energy expansion, and is expected to establish a new earnings base for the company.