The Independent Electricity System Operator(IESO) balances the supply of and demand for electricity in Ontario and then directs its flow across the province's transmission lines.

According to IESO, Ontario is a net exporter of energy: energy In 2010 we exported 15.2 TWh and imported 6.4 TWh


Ontario plans to convert some of the coal burning units to produce 2 terrawatt hours (TWh) annually from biomass

Ontario energy consumption(2005)

These figures are from different sources and use different base years but they give an approximate idea of how much energy Ontario requires.

Energy type Energy (PetaJoules*) Energy (MWh*)
Mining & manufacturing - 37.1% 1,031 286,391,180

Lloyd Alter wrote in TreeHugger that the Ontario Building Code for glass walls in condos does not specify an R-value whereas a minimum R-value is specified for the non-glass walls.

Ontario's building code changed as of January (2012), requiring all high-rise buildings to be 25 per cent more energy efficient than the Model...

According to

OPG has been exploring options to “repower” (change fuel in) some of its coal-fuelled electricity generating stations with natural gas and/or forest or agriculture-based biomass. Repowering these stations allows continued use of existing facilities owned by the people of Ontario, costs less than building new stations, reduces greenhouse gas emissions considerably, provides effective back up for growing intermittent renewable electricity sources like...

This page is a work in progress on so it may not be absolutely accurate

According to professor Joshua Pearce of Queen's University, Kingston, South East Ontario has the potential to generate over 90 GW (90,000 MW) of Solar PV on barren land. This is over 3 times our anticipated requirements.

The following maps are from Professor Pearce's report