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| Milestone | Date |
| RFP Issued | Wednesday, March 4, 2026 |
| Final date for RFP Question Submittal | Updated to Friday, March 13, 2026 |
| Phase 1 Proposal Submission Deadline (4:00 PM CPT) | Tuesday, March 31, 2026 |
| Notification of Phase 1 Results | Updated to Wednesday, May 6, 2026 |
| Phase 2 Proposal Submission Deadline (4:00 PM CPT) | Updated to Friday, May 15, 2026 |
| Notification of Phase 2 Results | Updated to Tuesday, June 16, 2026 |
Relevant questions and responses related to the Southern Illinois Power Cooperative 2026 Request for Proposals for MISO Capacity and Energy Resources will be posted on this page.
Yes, as long as they are relevant to the RFP.
Responses to questions will be provided as soon as practical. Response times will vary depending upon the complexity of the question.
SIPC is seeking capacity equivalent to up to 100 MISO Zonal Resource Credits (ZRC) beginning summer 2032 for a minimum period of five years. Proposals may be for annual or seasonal periods; SIPC has a particular need for the winter season(s). Proposals must include at least 20 MW of installed capacity and associated ZRCs, and firmness of capacity will be weighted heavier than energy components in the response evaluations.
Firm ZRCs are preferred rather than resource accreditation.
Yes, any load zone within MISO North will be considered. Zone 4 is most preferred followed by Zones 5, 6, and 7.
Yes, SIPC will consider financial capacity offers with no physical ZRC delivery.
SIPC will consider proposals from a diverse variety of capacity resources, including lithium-ion batteries. However, firm ZRCs are preferred rather than resource accreditation.
Yes, SIPC will consider proposals greater than 100 MW. Proposals must include at least 20 MW of installed capacity and associated ZRCs, and firmness of capacity will be weighted heavier than energy components in the response evaluations.
A long-form agreement incorporating the Edison Electric Institute (EEI) along with any necessary special provisions and credit terms for a longer-term deal, such as five years, may be used. However, negotiating and entering into an EEI master agreement would be preferred, if timing allows and both parties agree.
SIPC will review any project that can help meet its resource needs starting June 1, 2032. When evaluating proposals, SIPC will consider how far along the project is, as well as other factors, such as how reliable the power supply will be, how the total costs compare, and whether the resource meets required accreditation standards.
MISO awards for Zonal Resource Credits (ZRC) will count as accredited resources. If a project offers a specific number of ZRCs, those ZRCs will be treated as firm.