CleanCapital has acquired a majority interest in a 7.7 MW and 30.8 MWh battery storage portfolio through a joint venture with Osaka Gas USA, positioning CleanCapital as the managing member and lead operator of the partnership. The deal expands CleanCapital’s ownership of distributed energy storage assets and deepens Osaka Gas USA’s footprint in the U.S. power market as both companies target reliability and resilience needs in constrained, high-demand regions.
The portfolio includes two operating standalone battery energy storage systems on Staten Island in New York City, known as Arlington and Littlefield. The projects reached commercial operation in July 2023 and August 2023 and participated in New York’s Value of Distributed Energy Resources program. Under that framework, NYU Langone Hospitals serves as the sole net crediting offtaker for both facilities, providing a long-term demand anchor tied to behind-the-meter value streams.
CleanCapital said it will leverage its operating experience and vendor network to support performance and safety across the assets, including battery and technical operations and maintenance services. The company also cited specialized support from Energy Safety Response Group, which manages fire protection and emergency response planning for battery systems and provides Fire Department training.
The acquisition comes as storage continues to be deployed as a grid-support resource amid rising electricity costs, tight supply conditions, and increasing peak-demand pressure. Standalone battery systems can help reduce strain during peak periods, stabilize costs, and provide rapid response support that improves local reliability, which is especially relevant for dense urban grids like New York City’s.
CleanCapital, which focuses on middle-market solar and energy storage, said it has deployed more than $1.5 billion across distributed clean energy investments over the past decade and is building a broader pipeline by pairing institutional capital with in-house development and regional partnerships.
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“This investment reflects CleanCapital’s continued commitment to scaling reliable, resilient clean energy infrastructure in the markets where it is most urgently needed,” said Julia Bell, Chief Investment Officer at CleanCapital. “We are excited to work with Osaka Gas USA and to continue to grow our asset ownership and management with energy storage systems like these, which are essential to modernizing New York City’s grid and enabling affordable energy in high-demand regions.”
Julia Bell, Chief Investment Officer, CleanCapital
“We are pleased to partner with CleanCapital on this acquisition as we continue to expand our presence in the U.S. power market,” said Shingo Morii, Senior Vice President at Osaka Gas USA. “Projects like these play an important role in strengthening grid reliability and resilience in New York City, while supporting the integration of clean energy and meeting growing demand. We look forward to working with CleanCapital and the project stakeholders to deliver long-term value through safe and reliable operations.”
Shingo Morii, Senior Vice President, Osaka Gas USA
