The Ontario Energy Report provides an up-to-date snapshot of Ontario’s energy sector.

Electricity Data
Fourth Quarter 2017

October - December 2017


Transmission Grid-connected Generation Output (Q4)
Nuclear 23.2 TWh 62.7%
Hydro 9.3 TWh 25.2%
Wind 2.7 TWh 7.3%
Gas 1.6 TWh 4.3%
Biofuel <1 TWh 0.3%
Solar <1 TWh 0.2%
Conservation Savings (Q4)
Net Peak Demand Savings 15 MW
Net Energy Savings 150 GWh


Ontario Grid-Connected Peak Demand (Q4)

20,306 MW

set December 11, 2017, 6:00 pm EDT

Ontario Grid-Connected Peak Demand (for 2017)

21,786 MW

set in Q3 – September 25, 2017, 6:00 pm EDT

Commodity Cost

Commodity Cost (Q4) – Class A (¢/kWh)
  Q4 YTD
Hourly Ontario Energy Price
(Unweighted average)
1.34 1.41
Global Adjustment
(Average, Class A)1
5.30 5.08
Total 6.64 6.49
Commodity Cost (Q4) – Class B (¢/kWh)
  Q4 YTD
Hourly Ontario Energy Price
(Weighted Average)
1.48 1.58
Global Adjustment
(Average, Class B)1
10.37 9.97
Total 11.85 11.55

1 Class A customers are large electricity consumers that pay Global Adjustment based on their proportion of energy use during the five hours of the year with the highest demand. All other customers are Class B.

Ontario’s Transmission Grid

Ontario's Power Grid map, View Full Map PDF

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