Mailing Address
Independent Electricity System Operator
1600-120 Adelaide Street West
Toronto, ON M5H 1T1
Receive updates from the IESO
Sign up for weekly news on the electricity market and other initiatives:
About Ontario's electricity sector
Email:
customer.relations@ieso.ca
Visit:
Learn about Ontario's Power System>
What is Global Adjustment?>
Power Data>
Provide goods and services to the IESO
Telephone:
905.855.6401
Email:
rfp.info@ieso.ca
Visit:
Corporate Procurement>
Registered Participants with the IESO
Telephone:
905.403.6900
Toll-free number:
1.888.448.7777
Email:
customer.relations@ieso.ca
Energy Efficiency Programs
(energy efficiency incentive programs for Ontario homes, small business and industry)
Email:
saveonenergy@ieso.ca
Visit:
Save on Energy>
Save on Energy Retrofit Program
Retrofit Support
E-mail:
retrofit@ieso.ca
Toll-free number:
1.844.303.5542
Visit:
Retrofit program>
Retrofit portal>
The Retrofit Support line is available to answer your questions about the portal and program, including how to submit an application.
microFIT
(small renewable electricity generation projects)
Email:
microFIT.Contract@ieso.ca
Visit:
microFIT>
Beacon>
If your question is regarding an existing microFIT Contract, please include the Contract ID and ensure the question is communicated from the email address found in Section 9.1 or A(10) of the microFIT Contract.
FIT
(large renewable electricity generation projects)
Email:
FIT.Contract@ieso.ca
Visit:
FIT>
Beacon>
If your question is regarding an existing FIT Contract, please include your Contract ID.
Accessibility for Ontarians with Disabilities
As part of the IESO's efforts to meet the needs of people with disabilities, documents posted to this website will be made available in additional formats upon request to customer.relations@ieso.ca.
The IESO also welcomes feedback regarding the methods it uses to provide services to persons with disabilities. Feedback can be directed as follows:
- by telephone - 905.403.6900, toll-free: 1.888.448.7777
- in writing - IESO, Station A, Box 4474, Toronto, ON M5W 4E5, Attention: Customer Relations
- by email - customer.relations@ieso.ca
Any concerns not being adequately dealt with by the IESO can be raised with the IESO's General Counsel:
1600-120 Adelaide Street West
Toronto, ON M5H 1T1
Fax: 416.506.2843
Email: IESO-LegalServices@ieso.ca