There is one thing that I find very funny about "electric" cars....do people realize even if all cars went electric and we stopped using gasoline, you will have to produce more power to charge everyones cars in the world, which is going to be just as much if not more emissions.
-BigBOBCH
Maybe not emissions directly but we can't get out more that we put in.
If we gasoline to generate the electricity then yes I would be way more emissions. 1hp = .75 Kw so it would be much more efficient to put it straight to the wheels via transmission. If you take a 1hp gasoline generator you get less than .75 kw. plus the loss in transmitting lines, plus loss in charging batteries plus loss powering electric motor. plus loss in any other components. Simple Simon says it is a loss.
However coal and natural gas are more efficient.,
Here is how the efficiency calculation plays out (thanks to Grose). Start with a natural gas power plant running at 60 percent efficiency. Figure that 7 percent of the power gets lost in transmission. So the power coming to a residential outlet is about 55% efficient.
Now figure that 95 percent of the electricity makes it into the lithium battery – overall efficiency drops to 53 percent.
The final piece of the calculation is the car’s electric motor, which runs 90 percent efficient. The overall efficiency of an electric car is therefore 48 percent.
The efficiency of an automobile running on gasoline is 25 percent. A significant difference!
Working in the favor of electric cars is an energy efficient engine
The efficiency of an electric car drops to 32 percent if it relies on energy coming from a less efficient coal-fired plant (only 40 percent efficient).
You would still have to plug in the numbers for energy differences in building the cars and maintenance over the life of the autos.