I think you mean .5 kWh, yeah, that would take forever. I get about 1.2 kWh, which can recover most day to day driving. Having said that, I'm also thinking of getting an L2 for the winter. I don't think reduction in range will be that bad, but I got a free charging station with the car so might as well use it!
.90 cents CAD per kWh was a little nutty!
Ahhhh gotcha that makes way more sense!