Tank Farm 4 is a solar power facility located in Portsmouth, Rhode Island, operating under the jurisdiction of the Northeast Power Coordinating Council. With an operating capacity of 10 megawatts, this facility contributes to the energy needs of the ISO New England power control area. The plant is managed by Solar Breakers and is classified as unregulated, allowing for flexible operational strategies. The majority ownership is held by NextEra Energy Resources, a subsidiary of NextEra Energy, a leading company in the renewable energy sector. The facility harnesses solar energy, utilizing the sun as its primary fuel source, thereby promoting sustainable energy practices in the region.