€20/MWh does look cheap. Canadian rates vary geographically but not with the season, AFAIK. Here in B.C., where 92% of the electricity comes from hydro generation, the rate shown on my last utility bill was the equivalent of C$61.50/MWh.

€20/MWh is the spot price - what industrial customers would pay. I can still remember the spot price going as low as €10/MWh in the summer during the nineties.

For retail prices you add charges for energy-transportation, grid-rent, energy-consumption taxes and value-added taxes. Thus the retail price is seldom below $0.10/kWh.