CORE Electric Cooperative Request for Proposals for Utility-Scale Renewable/Zero-Carbon Generation and Energy Storage
CORE Electric Cooperative is seeking proposals for utility-scale renewable, zero-carbon generation and energy storage resources. This two-phase RFP covers wind, solar, battery storage, and other clean energy technologies, with proposals due August 24, 2026 (Phase 1) and September 24, 2026 (Phase 2). Contract negotiations are targeted for Q2 2027.
Categories
Important dates
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Published
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Final Date for RFP Question Submittal
Deadline for bidders to submit questions
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Submission deadline
Deadline passed -
Phase 1 Proposal Submission Deadline
Phase 1 proposals due
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Notification of Phase 1 Results (Shortlist)
Shortlisted bidders notified
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Phase 2 Proposal Submission Deadline
Phase 2 proposals due
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Notification of Phase 2 Results
Final selection results announced
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Contract Negotiations
Negotiations expected in Q2 2027
AI overview
CORE Electric Cooperative (CORE), through its power supply advisor ACES, is issuing this two-phase Request for Proposals (RFP) for utility-scale renewable/zero-carbon generation and energy storage resources. The RFP seeks to procure new capacity and energy to meet CORE's long-term resource needs, targeting cost-effective, reliable, and environmentally beneficial power supply options. Resources may include wind, solar, geothermal, hydroelectric, biomass, biogas, fuel cells, battery energy storage (standalone or paired), and other zero-carbon technologies. The RFP also allows for repowering or expanding existing facilities.
Key dates for this RFP are: RFP Posted on July 29, 2026; Final Date for RFP Question Submittal on August 11, 2026; Phase 1 Proposal Submission Deadline at 4:00 p.m. Mountain Prevailing Time (MPT) on August 24, 2026; Notification of Phase 1 Results (Shortlist) on September 15, 2026; Phase 2 Proposal Submission Deadline at 4:00 p.m. MPT on September 24, 2026; Notification of Phase 2 Results on October 23, 2026; and Contract Negotiations expected in the Second Quarter of 2027.
The RFP is administered by ACES (an energy services cooperative), and all questions and proposals must be directed to the RFP administrator at core2026RFP@acespower.com. A Notice of Intent to Bid is requested but not mandatory. The RFP includes several appendices including an evaluation form, market compatibility information, environmental attributes details, and a map of CORE's territory and transmission system. Responses to bidder questions are posted on the RFP website as they become available.
Proposals will be evaluated in two phases. The first phase involves initial screening and shortlisting, followed by a more detailed evaluation in Phase 2. The evaluation criteria are detailed in Appendix A. CORE seeks to negotiate contracts with successful bidders in the second quarter of 2027. Bidder questions are accepted until August 11, 2026, allowing for clarifications.
Resources & contact
Proposal Document
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