Energy Storage FAQs Summer 2026

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FAQ-Energy Storage-7

Q: Can a Seller with a Project selected in the RFP develop additional battery storage adjacent to the Project and sell capacity from that addition under a different arrangement?

A “Project” that would be eligible to participate in the Summer 2026 Energy Storage RFP is a new “Stand-alone” energy storage resource. As defined in the Act, Stand-alone means systems that are (i) separately metered by a revenue-quality meter that satisfies the requirements of the RTO; (ii) operate independently without constraints or hindrances from other generation units; and (iii) demonstrate the ability to charge and discharge independent of any generation unit output.

An energy storage resource selected in the RFP must continue to meet this definition during the term of the ISC Contract. Thus, there would be no prohibition to develop additional battery storage adjacent to the Project, as long as it does not impact any of the conditions from the definition above and in particular, the additional battery storage must have a separate revenue quality meter.

05-12-2026

Contract

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Q: Are Projects using a surplus interconnection service eligible to participate in the Summer 2026 Energy Storage RFP?

Please refer to the Draft Part 1 Proposal Requirements in Section 6 for a list of requirements that are anticipated at this time. This list is in draft form and is preliminary. There is no rule prohibiting a Project that uses surplus interconnection capacity from qualifying. The term “new” refers to the general rule that Projects that achieved Commercial Operations prior to June 1, 2026 are not eligible.

Please note several requirements that may be relevant at this time. In order to qualify, as bulleted in Section 6:

·       a Project that is interconnecting within MISO LRZ 4 will participate in the AIC procurement event and must provide either: (1) the Project Number from MISO; or if this information is not available (2) evidence the Project is in a late stage of development by providing documented evidence the Project has been accepted in an alternative MISO interconnection process, such as the Generation Facility Replacement Process.

·       a Project that is interconnecting within the ComEd LDA will participate in the ComEd procurement event and must provide either: (1) the Queue/OASIS ID from PJM; or if this information is not available (2) provide evidence the Project is in a late stage of development by providing documented evidence the Project has been accepted in an alternative PJM interconnection process, such as the Capacity Interconnection Rights (CIR) transfer process.

·       an Officer of the Seller would be required to certify that the Project is a new “Stand-alone” energy storage resource as this term is defined in the Act and the Seller has made all investigations it deems necessary to make this determination. As defined in the Act, Standalone means systems that are (i) separately metered by a revenue-quality meter that satisfies the requirements of the RTO; (ii) operate independently without constraints or hindrances from other generation units; and (iii) demonstrate the ability to charge and discharge independent of any generation unit output.

05-08-2026

Rules Part 1 Proposal

FAQ-Energy Storage-5

Q: Will the ISC Reference Energy Arbitrage Price ($/MWh) and the ISC Reference Capacity Price ($/MWh) be calculated based ISC Delivery Point or a pnode specific to the Project?

Under the draft ISC Contract, the ISC Reference Energy Arbitrage Price ($/MWh) and the ISC Reference Capacity Price ($/MWh) will be calculated based on the ISC Delivery Point, either MISO CP Node AMIL.BGS6 or PJM Pnode ID 116472935 COMED_RESID_AGG as applicable, and not based on the pnode specific to the Project. The ISC Delivery Point will be an input to the Product Order.

04-27-2026

Contract

FAQ-Energy Storage-4

Q: What will be the cadence of future procurements?

Please refer to the FAQ posted to the Energy Storage section of the IPA website.

This will be determined after the initial 2026 procurement has taken place. Timing of future procurements will necessarily follow timing outlined in CRGA which notes that procurements “shall be conducted in calendar years 2027 and 2028” in order to meet the 3,000 MW goal and that “the Agency shall conduct additional energy storage procurements in 2028, 2029, 2030” if, through the integrated resource planning process set to conclude in 2027, it is determined that more storage resources are needed beyond the 3,000 MW goal set by CRGA.

04-13-2026

General

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Q: When will details on contract terms and proposal requirements be issued?

Thank you for your interest in the Summer 2026 Energy Storage RFP. The Draft ISC Contract and the Preliminary Proposal Requirements will be posted to the Draft Documents page in the Energy Storage section of the procurement website on April 22, 2026. Also, on April 22, 2026, the first or two invitations to comment on these documents will be issued.

A public stakeholder workshop will be held on April 8, 2026 and April 28, 2026 to solicit feedback related to the development these materials. A first stakeholder workshop was already held on March 17, 2026 and materials related to that workshop are available on the Draft Documents page. Please RSVP here to attend the stakeholder workshops: https://www.ipa-energyrfp.com/es-rsvp/.

Additionally, if you have not done so already, please register to join our mailing list to receive updates and information regarding the Energy Storage RFP here: https://www.ipa-energyrfp.com/contact-us/register/.

04-03-2026

Contract General Rules

FAQ-Energy Storage-2

Q: Will the stakeholder workshops be recorded?

Recordings of the presentation portions of the stakeholder workshops will be posted to the Draft Documents page of the Energy Storage section of the procurement website.

03-20-2026

General

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Q: Are the stakeholder workshops held in person?

No, the Summer 2026 Energy Storage RFP Stakeholder Workshops will be held virtually via Zoom. Interested parties may RSVP to attend the stakeholder workshops here. In addition to attending the live workshops, the Procurement Administrator will post the presentation materials and the audio recordings to the Draft Documents page of the Energy Storage section of the procurement website for interested stakeholders to review.

03-05-2026

General