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

Electricity Data
Fourth Quarter 2018

October - December 2018


Transmission Grid-connected Generation Output (Q4)
Nuclear 23.18 TWh 61.5%
Hydro 9.53 TWh 25.3%
Wind 3.14 TWh 8.3%
Gas 1.68 TWh 4.5%
Solar <1 TWh 0.2%
Biofuel <1 TWh 0.2%
Conservation Savings (Q4)
Net Peak Demand Savings 22 MW
Net Energy Savings 112 GWh


Ontario Grid-Connected Peak Demand (Q4)

20,152 MW

Set on November 22, 2018, 6:00 pm EST

Ontario Grid-Connected Peak Demand (for 2018)

23,240 MW

Set in Q3 – September 5, 2018, 6:00 pm EST

Commodity Cost

Commodity Cost (Q4) – Class A (¢/kWh)
  Q4 YTD
Hourly Ontario Energy Price
(Unweighted average)
2.10 2.24
Global Adjustment
(Average, Class A)1
5.48 5.06
Total 7.58 7.30
Commodity Cost (Q4) – Class B (¢/kWh)
  Q4 YTD
Hourly Ontario Energy Price
(Weighted Average)
2.25 2.43
Global Adjustment
(Average, Class B)1
9.67 9.07
Total 11.92 11.50

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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