Plus Power develops, owns, and operates standalone battery energy storage systems that enable a more efficient and reliable electric grid. With over 7 years of development history and 11+ gigawatts in development across more than 20 U.S. states, Plus Power has established itself as a market leader in the standalone energy storage sector. The company's portfolio includes operating facilities in Arizona, Hawaii, Maine, Massachusetts, and Texas, with 1,650 MW / 4,150 MWh currently operating or under construction. Plus Power achieved the world's largest grid-forming performance by a battery system, demonstrating the critical role their projects play in modernizing America's aging power infrastructure.
Plus Power's facilities deliver grid reliability services that respond in milliseconds during record peak demand, unexpected winter storms, and energy scarcity events. Their Kapolei Energy Storage project in Hawaii provides 17% of Oahu's 1100 MW peak load, while their Rodeo Ranch facility in Texas responds instantly to help keep the lights on during extreme weather. The company has secured significant tax equity investments, including $160 million from Morgan Stanley for ISO-NE battery storage projects in 2025, and recently brought New England's largest utility-scale battery energy storage system online in Maine. Led by seasoned energy and battery storage executives, Plus Power's team combines in-house capabilities from greenfield development through operations, applying data-driven approaches to site projects that relieve grid congestion, increase transmission efficiency, and support the transitioning electric grid.
