Actually the cost of the energy retrofits is about 20 cents a kwh, while the cost of new nuclear at Darlington is in the 3 cents a kwh range. 

Unfortunately, the current bunch of science illiterate halfwits at Queen's Park, with their law degrees and English diplomas, have overruled the province's engineers, and built a lovely infrastructure of lucrative Big Oil gas contracts backing up a worthless wind/solar infrastructure and associated up to 10 times sized transmission builds.

In the faint hope a thinking Conservative government replaces the dimwits in 2018, all those lucrative energy contracts could be cancelled and power rates cut in half. 

Makes the retrofit decision a bit dicey.

Google "lawrence-solomon-if-voters-want-to-rip-up-ontarios-outrageous-renewable-energy-contracts-the-courts-wont-stop-them"