hcsharp wrote:The EPA 5-cycle estimate for the Volt is 360 Wh/mi (350 for 2013) while the FFE is 320 Wh/mi, so the Volt consumes roughly 10% more electricity according to the EPA, despite worse performance in EV mode.
Exactly. In the EPA test cycle (which exercises the car as a hybrid), the Volt consumes 360 Wh/mi from the wall
, but that's in conjunction with
the energy it also consumes from the pump
. So, per mile, the electric energy input required is offset by the gasoline energy consumed. Overall, the Volt consumes a lot more energy (electric and gasoline) than your typical EV. Compared to the FFE, the Volt is simply less efficient.
The consumption of gasoline is particularly inefficient (compared to a pure EV). It is estimated that the production of one gallon of gasoline consumes about 7 kWh of electricity (at the refinery, etc.). Most EVs could travel at least 25 miles directly
on that same 7 kWh. For typical gasoline car to travel the same 25 miles, it needs that 7 kWh (indirectly through the gallon of gasoline) plus all the other energy costs
associated with extracting the oil, refining it into gasoline, transporting the gasoline to the pump, etc.. Amazingly inefficient.