Daily Archives: September 5, 2017

What If All American Cars Were Electric?

An Antiplanner reader writes, what “if all vehicles in USA were powered by electricity?” The reader wasn’t sure, but suspected that it would be “impossible to do with electricity as now generated and distributed.” I was inclined to agree, but when I looked into it, the results surprised me.

First, as I’ve noted before, only about a third of the power used to generate electricity ends up being delivered to the end users; the rest is lost in generation and transmission. This would seem to reduce the apparent efficiency of electric cars.

Counter to that, however, internal combustion engines dissipate most of their energy in the form of heat. On average, only about 21 percent of the energy from burning gasoline or Diesel is used to move vehicles; the rest is lost. Electric motors, however, only lose about 20 percent of their energy as heat. This more than offsets the losses from electrical generation and transmission. Continue reading

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