[Patrick]

Originally Posted by Ladogaboy

I don't know if this has already been posted: http://www.stanford.edu/group/greend...slaReading.pdf

Even in this (obviously biased, imo) study, ...

Yes, they pick the average refinery efficiency, then compare it to the most efficient powerplant.

But if we use their well-to-wall efficiency number (52.5%) and refigure the Mini Blog results we get:

30 kwh/0.525 = 57.14 kwh to go 100 miles.

And if we use, say, a Toyota Prius (50 mpg) for comparison instead of the fleet average (I'm pretty sure his electric car can't do all of the things an entire auto maker's fleet can do. In fact, I would be surprised if it could do the same things a Prius can in terms of load capacity, passenger capacity, range, etc.), we get:

100 miles/50 mpg = 2 gallons.

2 gallons X 8 kwh/gal = 16 kwh to go 100 miles.

So the ratio in fact is 57.14/16 = 3.57.

The electric car uses 3.57 times as much electricity to go 100 miles as a Toyota Prius.