High Seas wrote:
A dollar a night (i.e. for a full charge) sounds very low,
Intuitively, I would have agreed with that. But when I ran a bottom-of-the envelope calculation to get a sense of the cost, it turned out to be plausible.
Let's say that this guy's car has a maximum power of 50 kilowatt, which is 65 horsepower. Let's say its motor operates, on average, at half its maximum power, or 25 kilowatt. Let's also say that it runs for a total of one hour a day, which is the length of a typical commute and back. That would mean the car uses 25 kW a day, which it has to 'refuel' overnight. In order for that to cost a dollar a day, the price of electricity would have to be four cents per kilowatt hour.
Is that plausible? I think it is. Googling around, I found this map for the average residential cost of electricity in the US, courtesy of a dude named Michael Bluejay. (Electricity prices in Canada shouldn't be outrageously different.)
As you see, the map shows that typical prices are about double what I just calculated. That's well within the range of plausibility if you account for possible overnight rebates, and for the general fudge factor of such bottom-of-the-envelope calculations. I believe that this one-dollar-a-night figure is probably true.