Independent Electricity System Operator (IESO)
The Independent Electricity System Operator is responsible for operating the electricity market and directing the operation of the bulk electrical system in Ontario.
IESO
IESO hopes to curtail 100 MW of commercial HVAC load next year under a new program targeted at resources available during system peaks, but not for the full six-month commitment of the capacity market.
IESO
Storage developers in Ontario are pushing back on IESO’s 100-MW/minute ramp limit for batteries, saying it will reduce their revenues.
IESO
IESO removed a credit rating requirement for prospective bidders to enroll in its Transmitter Selection Framework Registry, a prequalification mechanism for the competitive procurement that is expected to begin in 2026.
Mayor Wendy Landry
IESO and the Ontario Energy Board have added three new members to their governing bodies — including two Indigenous women mayors.
© RTO Insider LLC
The Ontario government’s efforts to align IESO and the Ontario Energy Board to make the province an energy “superpower” was the dominant theme at the 2025 Ontario Energy Conference.
© RTO Insider
The Ontario Energy Board's new CEO insisted it will retain its independence in adjudications even as it embraces the province’s directive to consider economic development in its policymaking.
© RTO Insider LLC
IESO is adopting more “proactive” planning processes in response to a projected load increase of 75%.
Oxford Properties
IESO’s plan to give its staff authority to set market parameters without approval by the Board of Directors has sparked a debate over the ISO’s governance and the role of stakeholders.
IESO
IESO system planners recommended the construction of a $1.5 billion HVDC line to meet Toronto’s growing energy needs, saying it would be more “future proof” than two cheaper options.
Corre Energy/Long Duration Energy Storage Council
IESO has increased the capacity target for its planned solicitation for long lead-time resources, even as it acknowledges questions about the need for the procurement.
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