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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 power system is operating reliably through the COVID-19 outbreak. Please check this site for updates.

Coronavirus (COVID-19) update

Ontario’s electricity system is reliable with adequate supply to meet our needs. The IESO has implemented controls to ensure the continued reliable operation of the grid and minimize risks to its employees and stakeholders. Currently, most non-essential IESO staff are working from home, and increased hygiene and physical distancing measures are in place to protect those employees working onsite. The IESO is not accepting visitors at our three facilities, and in-person engagement and meetings are no longer being scheduled. Where possible, meetings and events including engagement activities are being moved to conference calls or webinars. Registration information has been updated on the website to reflect this change.

Thank you for your patience and co-operation. Please contact if you have any questions.

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Save on Energy

Development of a transmission-distribution interoperability framework

Report explores T-D interoperability models

Development of a Transmission-Distribution Interoperability Framework explores several potential interoperability models along a continuum, looks at the pros and cons of each, and sets out next steps, including ongoing projects to test key aspects of operability.

Learn more.


Demand and Operations, Past and Future - A new Powering Tomorrow podcast episode

In this episode, Terry Young, IESO Interim CEO interviews Matthew Day, Program Manager at WR Community Energy and Tonja Leach, Executive Director of QUEST. They discuss the changes in the energy sector, especially how community preferences such as energy transition and electrification have gained in importance, and what is needed to keep the progress going.

Listen to the podcast

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Stakeholder engagement meetings

The agenda for the Dec 14-16 stakeholder engagement meetings is now available, and registration is open.

Meeting materials and recorded presentations for the November 18-20 stakeholder engagement meetings are also posted.