Oddly enough, Ontario's renewables fee is close to Germany's fee
http://www.thestar.com/business/2013/02/26/surplus_wind_power_could_cost_ontario_ratepayers_up_to_200_million_ieso.html
When theres more power than the system can handle, the IESO sells it to neighbouring provinces and states sometimes at a loss, and sometimes actually paying them to take it.
Those losses are absorbed by ratepayers, and added to the electricity bill as the global adjustment, which now often exceeds the price of energy by a wide margin.
So far this month, for example, the market price for power has averaged 2.96 cents a kilowatt hour. The global adjustment has been 5.73 cents a kwh. Consumers pay delivery and debt.
There's a bunch of interesting points in this article about Ontario's grid power situation and the requested changes. Note that nuclear power is the absolute worst fit.
This particular battle is probably one to watch. There is a big expansion in wind power coming in the area, and this matter will be dealt with one way or another, because if the rate adjustment is already that high, tripling the inflow within another few years is going to force some kind of change. Retroactively changing the deal for those that invested with guarantees doesn't seem the best way to handle it.
Edit: I don't understand why their fee is so high. Here's the graph mix:
And here's a link to their page with a lot of this info. They have an awfully high percentage of nuclear, and with demand fluctuating like this and nuclear at close to 60%, they must have to boggle everything else:
http://www.ieso.ca/imoweb/siteShared/monthly_update.asp?sid=ic
Here's current demand graphs:
www.ieso.ca/imoweb/siteShared/monthly_update.asp?sid=ic