The EPA is asking the same question right now. This one isn't as hard as answering the Volt mystery.
I'm feeling the MPG may be dead soon
Originally Posted by
TheOtherDave™
Having driven most of the upcoming BEVs, miles per kW makes the most sense to me.
True, Mi/kWh would probably be best. I'm thinking that it may be also well enough, then, to equate any full-electric/gas-backup vehicle like the Volt as having a Mi/kWh with a kWh/gallon spec.
I can really only imagine that the EPA being the EPA will be utilizing some other off the wall method because they think people are stupid (which they are) and that they've finally gotten the whole 'MPG' thing (which some of them have).
:edit2:
distance/charge would be a useless number, almost like the range of a vehicle now. I can see this becoming an issue fast as energy storage technologies get better and as the range becomes less and less the limiting factor.
I mean if car A has a 200mi/charge and car B has 100mi/charge, But car A is only half as efficient then car A will cost 4 times the cost of car B to fill up to gain it's mileage advantage.