Long-Term RFP and Expedited Process

After more than a decade of strong supply, Ontario is entering a period of emerging electricity system needs, driven by increasing demand, the retirement of the Pickering nuclear plant, the refurbishment of other nuclear generating units, as well as expiring contracts for existing facilities.

To address these needs, the IESO is competitively securing 1,500 MW and 300 MW of capacity through an expedited procurement process “the Expedited Process” (E-LT1 RFP) and the Same Technology Upgrade Solicitation respectively. The IESO expects to procure an additional 2,200 MW from the subsequent Long-Term Request for Proposals (LT1 RFP). The 2022 Annual Acquisition Report (AAR) describes these mechanisms and needs in more detail.

  • The LT1 RFP, together with the Expedited Process, is expected to competitively procure year-round effective capacity from dispatchable new build resources, including new build hybrid electricity generation and storage facilities, registered or able to become registered in the IESO-administered markets, larger than 1 MW and which can deliver a continuous amount of electricity to a connection point on a distribution system or transmission system for at least four consecutive hours.
  • The Same Technology Upgrades Solicitation is a targeted call for new cost-effective capacity upgrades from existing contracted facilities. The streamlined process aims to incent additional output from dispatchable resources that can deliver a continuous amount of electricity for at least eight consecutive hours, and be in service between May 2025 and 2026.

In advance of the Expedited Process and the LT1 RFP, the IESO issued the Long-Term Request for Qualifications (LT1 RFQ) to establish a list of applicants with the experience and capability to successfully develop, construct and operate facilities acquired through these procurements. The LT1 RFQ is now complete, and the list of Qualified Applicants is available below.

Future long-term procurements, including the LT2 RFP to be launched in 2023, may be suitable for resource types that are not yet fully enabled in the IESO-administered markets, or for projects that require longer development timelines. Procurement design and requirements have been and will continue to be shaped by input from stakeholders through the Resource Adequacy Engagement, as well as other IESO assessments and engagements. 

The E-LT1 RFP Submission Deadline of February 16, 2023 has passed and the IESO is now evaluating E-LT1 RFP Proposals. The IESO will not respond to specific questions regarding the status of an E-LT1 RFP Proposal during the Proposal evaluation process. Results will be communicated when the evaluation process is complete.

If your inquiry is related to the LT1 RFP the IESO will consider your questions and respond where appropriate.

Expedited Process Final Procurement Documents

CIB E-LT1 Guidance Documents

E-LT1 Question and Comment Period Responses

Same Technology Upgrades Solicitation Documents

LT1 RFP Procurement Documents

The LT1 RFP procurement documents will be very similar to the Expedited Process documents. A list of expected differences is provided below.

E-LT1 and LT1 RFP Updates

The E-LT1 RFP Submission Deadline of February 16, 2023 has passed and the IESO is now evaluating E-LT1 RFP Proposals


This request for qualifications (“RFQ”) and the statements and information contained herein, are based on the proposed design as of the date of posting and remain subject to amendment following the process set out in the RFQ. Nothing in this RFQ, or the posting thereof, obligates the IESO to continue or conduct the procurement process contemplated herein, or any other procurement process. Nothing in this posted RFQ or contract constitutes, nor shall it be construed to constitute, an agreement, guarantee, representation, or warranty, express or implied, on behalf of the IESO. The IESO provides no such agreement, guarantee, representation, or warranty and disclaims any and all liability associated therewith. In the event there is any conflict or inconsistency between this RFQ or contract, and the IESO market rules, any legislation or regulation, the terms in the market rules, legislation, or regulation as applicable, govern

Expedited Process Procurement Activities

The dates provided below are aligned with the E-LT1 RFP and are subject to change.

Date              Procurement Activities

December 6, 2022

Final E-LT1 RFP and Contract posted

January 9, 2023

Question and Comment Period Batch 1 – Deadline for Questions

January 19, 2023

Question and Comment Period Batch 1 – IESO Responses Posted

February 2, 2023

Question and Comment Period Batch 2 – Deadline for Questions

February 9, 2023

Question and Comment Period Batch 2 – IESO Responses Posted

IESO’s Deadline for Issuing Addenda to E-LT1 RFP and E-LT1 Contract

February 16, 2023

E-LT1 RFP Proposal Submission Deadline

May 1, 2023

E-LT1 RFP Contract Offer Announcement (Target)

Archived Procurement Documents


Expedited Process Procurement Documents

Same Technology Upgrades Solicitation Documents