Mass Midstate Solar 3 is a solar power facility located in Warren, Massachusetts, within the Northeast Power Coordinating Council region. With an operating capacity of 4 MW, the plant harnesses solar energy to generate electricity. It is managed by TerraForm Power and operates in the ISO New England power control area. The facility is unregulated, and its majority ownership, along with the holding company, is held by an undisclosed buyer. The primary power purchaser for the energy produced is the University of Massachusetts, reflecting a commitment to sustainable energy solutions.