Reliability Outlook: Ontario Electricity System Prepared Through Summer 2025
March 21, 2024
Ontario’s electricity grid is prepared for the next 18 months, with sufficient supply expected to be available to meet the needs of residents, businesses and communities, according to the IESO’s latest Reliability Outlook. As we enter the summer 2024 season, sufficient reserves will be available throughout this period, even as we observe extended forced transmission outages. If extreme weather materializes, reliability will be ensured by relying on up to 2,000 MW of imports from neighbouring jurisdictions or other operating actions.
Beyond this spring, Ontario’s electricity system is expected to remain adequate thanks to resources secured via the 2023 Capacity Auction for the 2024 summer and 2024-25 winter obligation periods. Supply will also benefit from resources procured via the Same Technology Upgrades Solicitation, which will start coming online in May 2025, and the potential connection of new storage to the grid.