Sumitomo Corporation announced on 1 October 2026 that construction has begun on the Sumitomo Namie grid-scale battery energy storage facility in Fukushima Prefecture, rated at 62 MW with 291 MWh of storage. Commercial operations are scheduled for 2029.
Sumitomo Namie project facts from the release
| Item | Figure | Basis |
|---|---|---|
| Rated output | 62 MW | Sumitomo, 1 October 2026 |
| Storage capacity | 291 MWh | Sumitomo, 1 October 2026 |
| Duration at full power | about 4.7 hours | ENB calculation: 291 MWh divided by 62 MW |
| Owner | Sumitomo, 100%, through BS Holdings | Sumitomo |
| Project company | Namie Battery Storage LLC | Sumitomo |
| Lead arranger | MUFG Bank | Sumitomo |
| Operations | 2029, scheduled | Sumitomo |
Auction route and portfolio
The project was selected in Japan’s Long-Term Decarbonization Power Source Auction, launched in 2024, which gives long-term revenue visibility to new decarbonized capacity. Sumitomo says it is involved in 9 battery storage projects with a combined output of about 200 MW, including those under construction, which puts Namie at about 31% of that output (ENB calculation). The financing amount is not disclosed.
Sumitomo Namie dates to watch
The release is dated 1 October 2026, so the announcement is 20 days old; the next dated checks are financial close details and the 2029 operations date. Another recent project with a similar duration: Ørsted’s Iceni battery near Norwich.
Add EnergyNews.biz as a preferred source on Google
