I looked into this a few weeks ago while exploring purchasing an electric car, and from what I could find "tow charging" was experimented with but has basically been given up on. The expectation is that if you lose power, you will need a flatbed truck to cart the car to a charging station.
> Charging efficiency isn't 100%, so you'd have to tow it further than the range you need
That's not how it works. You basically get 5 mpg or less on the truck, while the car charges at significantly higher rates than the speed of the truck (in mph), because the car is more efficient at using the energy.
Ah I think I was tripped up by the same thing as the top commenter. This sounds like it violates the law of conservation of energy.
The key here is that when towing (as opposed to going downhill) you can put much more energy into the motor generators per mile than is required to drive a mile. Due to charge/discharge losses, for your example this would have to be > 4x the amount. This obviously assumes the EV can regen at high sustained rates and you have a powerful tow vehicle.
So yes, you're right. The energy/distance argument should be one and the same.