Whilst electric vehicles have seemingly obvious environmental benefits their running costs are more obscure. With traditional petrol and diesel vehicles the standardised MPG based on the urban cycle at least gives you an idea whether your car is going to be economical or not and allows you to compare different vehicles easily.
An equivalent cost per mile standard for electric cars has not yet been decided upon, making it difficult to compare hybrids, full electric and traditional fuel cars directly against one another. After all, electricity is not cheap and it has its own carbon footprint.
Charging loss means that you don’t know accurately how much electricity you are actually putting into the car nor how much of the car’s battery capacity is useable. Temperature can also play a part in the vehicle’s range. Then there is the variable rates payable for electricity depending upon your local supplier.
Taking all of these factors into account and computing a meaningful MPG comparison figure is not going to be easy but will have to be done to enable fair comparison of vehicles, rather than the current thinking that electric cars are always more efficient and better for the environment.


