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Connecting Today.
Powering Tomorrow.

The Independent Electricity System Operator (IESO) works at the heart of Ontario's power system. The IESO delivers key services across the electricity sector including: managing the power system in real-time, planning for the province's future energy needs, enabling conservation and designing a more efficient electricity marketplace to support sector evolution.

Ontario's Electricity System Transformation

In the coming years, we will see an unprecedented transformation of the Ontario power grid. Our reliance on electricity will increase, driven by economic growth, decarbonization and consumer preferences. As the province’s system planner, the IESO is taking action to prepare for our near- and long-term energy needs through our Pathways to Decarbonization report, Annual Planning Outlook and Conservation and Demand Management Framework Mid-Term Review.

Learn more below about the work being done to ensure a reliable, affordable and sustainable energy future.

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CDM Mid-Term Review

Energy efficiency delivered through conservation and demand management programs (CDM) is a key resource for maintaining a reliable, affordable and sustainable electricity system in Ontario. As demand grows, the value of CDM increases as a low-cost, non-emitting resource that can respond to changing system needs, and support broader economic development and decarbonization objectives.

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Pathways to Decarbonization

Eliminating emissions from Ontario’s electricity grid while supporting broader decarbonization efforts will be a significant and complex undertaking. The Pathways to Decarbonization report explores this challenge, identifying risks, opportunities and actions to consider, and analyzing potential approaches for future decision making.

Learn more about Ontario's energy transition.

Hamilton skyline during the day

Annual Planning Outlook

The Annual Planning Outlook provides a long-term view of Ontario's electricity system, forecasting system needs and exploring the province’s ability to meet them. Looking forward using current, confirmed information, it gives the sector the most predictive signals possible to serve as a guide for near-term investment decisions and activity.

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