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. http://www.queensu.ca/news/articles/solar-energy-production-has-enormous.... This is over 3 times our anticipated requirements.
The following maps are from Professor Pearce's report