This is a service / maintenance or supply contract in Fort Defiance, Arizona. Contact the soliciting agency for additional information.

The Navajo Tribal Utility Authority ("NTUA") invites qualified companies ("Proposers") to submit a written proposal for design engineering services and subsequent construction oversight and commissioning services (together the "Proposal") for a photovoltaic solar generation and battery storage (BESS) facility located on a site controlled by NTUA on the Navajo Nation (together the "Project"). Procurement of materials and construction of the Project will be solicited in a separate Request for Proposals ("Construction RFP") and the successful Proposer from this solicitation will be responsible for oversight of construction and commissioning of the Project for the company selected by the Construction RFP ("Construction Contractor"). This RFP proposes to procure design engineering services, construction oversight and commissioning services from a qualified provider for a twenty five (25) MW-AC photovoltaic solar generating facility and a 5 MW-AC by 20MWH-AC battery energy storage system generation facility located at the addresses listed on Attachment A that is in Round Rock Arizona (approximately six (6) miles southwest of the intersection of Highway 191 and Indian Route 12). Following commercial operation, Proposer may continue O&M services for a period of five (5) years, if selected to do so by the NTUA. Commercial operation for the Project is required on or before December 31, 2026. Questions Due December 22nd 2025 Notice to Proceed February 20th, 2026 Commercial Operation On or before December 31, 2026 All questions must be submitted in writing to Andrea Hale, Contract Administrator via email at andreah@ntua.com. NTUA will only respond to written questions related to this RFP submitted by the question due date. Rejection of Proposals: NTUA reserves the right to reject any or all Proposals and to waive informalities in the Proposals received whenever such rejection or waiver is in the best interests of NTUA. NTUA reserves the right to reject any proposal based on deficient past performance, including projects conducted with NTUA, other Navajo Nation agencies, the federal, state or local governments, or any commercial project. The method of Contractor Selection has not been Determined at this time