Google tells me the "average" EV goes 5 km on 1 kWh.
Based on the prices I cited earlier (C$0.10/kWh and C$1.50 litre of gasoline), 100 km in an "average" EV would cost C$2.00 in fuel.
Our '07 Dodge Grand Caravan averages about 15 l/100 km, so my fuel cost runs about C$22.50 (C$30.00 in town in the winter, C$15.00 on the highway in the summer.)
So fuel savings with an EV would average C$20.50/100 km.
We're driving about 18,000 km a year.
18,000 km x C$2.00/100 km = 180 x 2 = C$360 annual fuel cost for an EV.
18,000 km x C$22.50/100 km = 180 x 22.5 = C$4050 annual fuel cost for our van.
So, the annual fuel savings for us (in the land of expensive gasoline and cheap electricity) would be C$3690.
However ...
- The electricity prices are based on charging at home. The gap would close for trips.
- Increased demand might drive up electricity costs.
- The capital cost of an EV to replace the van (seat 7, carry 4x8 sheets of plywood and drywall) would be very high, if such a vehicle even exists.
- An EV big enough to replace the van would likely use far more electricity than average.
- Cold weather saps an EV's range. We have a lot of that here.
- Insurance on an EV would be at least C$1000 higher/year, likely more.
And therefore it might make more sense for us to run a small EV as a 2nd vehicle, which would suffice for about half our driving - or perhaps go to one vehicle, a PHEV van that would offer the same utility we enjoy now but save a lot of money presently spent on fuel.
Regardless, the carbon tax on fuel will only increase, making the fuel-to-electricity ratio even higher. We're close to the tipping point here.