Port Inc. plans to expand its grid-scale battery storage portfolio, targeting the addition of about 10 projects annually, the company announced on April 17, 2026. On the same day, it signed a 1.6 billion yen green loan agreement with MUFG Bank to finance the first four assets under the initiative.
According to the statement, the company will develop the projects in-house to accumulate expertise and minimize costs. It will continue to focus on unsubsidized high-voltage merchant assets to maintain rollout speed and flexibility.
The four projects that secured financing include two in Nagano Prefecture that are scheduled for December 2026 and May 2027 commissioning and two in Nagasaki Prefecture targeted for January and April 2027 commercial operation. Construction of all four projects is expected to begin around June 2026.
Under the terms of the loan, Port must maintain consolidated net assets at no less than 75% of the higher of the previous fiscal year-end level or the level as of the fiscal year ended March 2025, and avoid recording two consecutive annual consolidated losses. From FY2028, it must also avoid negative operating cash flow from the four projects in two consecutive years.
The company’s commitment to scale up its grid-scale battery storage business follows its early success with the three 2MW/8MWh facilities that it built in Gunma Prefecture in 2025 as a pilot. Port said the projects reached profitability in their first fiscal year of operation.
