Investing in the safe, reliable, clean power future of Cochise County, AZ

Three Sisters Solar Project

Delivering valuable capacity to fast-growing Cochise County, Arizona

The BrightNight Three Sisters project will feature 300-megawatts (MW) of solar and 300MW / 1200MWh of battery storage. Located on 2,300-acres in Cochise County, Arizona, this dispatchable power project will provide valuable capacity and economic investment to the region and its energy users. Also, it’s infrastructure will operate without added burden to public systems such water and roads.

  • 300 MW

    Of clean, renewable energy

  • $259M

    Total economic investment over the life of the project

  • $34.1M

    In tax revenue over the life of the project

  • $48.7M

    In direct economic output during construction

  • 250

    Construction jobs and 3-5 permanent O&M careers

  • $15.9M

    In local labor income during construction

Project Location

The BrightNight Three Sisters Solar Project is located approximately 11 miles southeast of Interstate 10 (I-10), 14 miles south of the city of Willcox, and approximately 2 miles east of U.S. Highway 191 (US 191). Please refer to the maps below for a detailed depiction of the project’s location.

Past Events & Documents

  • Application for Certificate of Environmental Compatibility + Exhibits
  • Folleto de aviso público
  • Feb. 27 – Mar. 1 – Certificate of Environmental Compatibility (CEC) Line Siting Hearing
  • Feb. 27, 5:30- 6:30PM – CEC Hearing public comment period; The Willcox Community Center; 312 W Stewart St, Willcox, AZ 85643
  • Prefiling Conference – The Arizona Power Plant and Transmission Line Siting Committee
  • Gen-Tie Route Tour, Feb. 28, 9AM – Please refer to this route guide and map for details of the planned gen-tie route tour. 
  • Pre-Conference Hearing – CEC Pre-Conference Hearing documentation for the Three Sisters gen-tie proposal
  • Community Notice – Informational notice distributed to project community members
  • Three Sisters CEC Hearing Transcript – Feb. 27, 2023 – Transcript of testimony provided on Day 1 of the Three Sisters CEC hearing for the proposed project gen-tie
  • Three Sisters CEC Hearing Transcript – Feb. 28, 2023 – Transcript of testimony provided on Day 2 of the Three Sisters CEC hearing for the proposed project gen-tie
  • Three Sisters CEC Committee Approval – The Certificate of Environmental Compatibility (CEC) is granted to the BrightNight and its successors for the construction of Three Sisters Solar 230 Kilovolt Gen-Tie Project by a vote of 9 to 0 in BrightNight’s favor
  • Three Sisters Community Open House – June 21, 2023 – BrightNight  was pleased to host a project open house including the Three Sisters project team to share information regarding project benefits and our proposed construction timeline. Experts were on hand with project simulations and informational brochures to answer questions. The Open House took place at the Wilcox Community Center (312 W. Stewart Street, Wilcox, AZ 85643) from 5:00PM – 6:30PM.

Upcoming Events

  • Special Use Permit Hearing   Aug. 9, 2023 – We are pleased to pursue a special use permit for our solar project from Cochise County. BrightNight will present project information and address questions during a Planning & Zoning meeting to be held at 1415 W. Melody Lane, Building G, Bisbee, Arizona 85603.

Three Sisters Community Notices

  • CEC Transmission Line Permit Community Notice – Informational notice distributed to project community members detailing the line siting permitting process and infrastructure details
  • Special Use Permit Community Notice – Informational notice distributed to community members with details pertaining to the solar project infrastructure, the intent to request a Special Use Permit, and invitation details for a Three Sisters Community Open House event

Project FAQs

Thanks to exciting renewable energy adoption across the United States, most people are familiar with the benefits of solar power. But how it’s developed, constructed, and maintained is complex. We’ve compiled a few FAQs to help address your questions.