Annual Report on Energy-Efficiency Activities

Ontario achieved 1.8 terawatt-hours (TWh) of energy savings in 2017, the highest annual savings achieved to date. At just under two cents per kilowatt-hour, energy efficiency continues to be the most cost-effective resource for Ontario’s power system.

2017 Highlights

The IESO and LDCs achieved a record 1.8 TWh of energy savings in 2017, representing more than a 55 per cent increase over 2016 savings.

Energy efficiency remains Ontario’s most cost-effective resource at 1.69 cents per kWh.

The IESO’s transmission-connected customers achieved 101 GWh of energy savings through the Industrial Accelerator Program.

The commercial and institutional sector Retrofit Program achieved a total of 663 GWh energy savings predominantly through lighting projects.

The residential sector Coupon and Instant Discount Programs achieved a total of 1,387 GWh energy savings primarily as a result of ENERGY STAR® rated LED lighting.

The Business Refrigeration Incentive Program contributed to over 1,000 projects through energy efficient upgrades to existing equipment.


The IESO publishes yearly energy-efficiency program results in its annual report.

For more information, visit the 2017 Report on Energy-Efficiency Activities.

See Document Library for historical Annual Conservation Reports.

Quarterly Conservation Progress Reports

The Conservation Progress Report highlights the results of conservation programs by quarter, such as savings for residential, business, and industrial programs.

Fourth quarter reports detail savings results and program participation totals for the entire year.

Quarterly Conservation Progress Report

Third Quarter, 2018

See Document Library for historical Quarterly Conservation Progress Reports.