Electric vehicles (EVs) have been around about as long as cars themselves. In fact, primitive EVs were the dominant form of automotive transportation at the dawn of the auto age in Europe and the U.S. in the late 19th century. It wasn't until the 1920s — when the U.S. road system was starting to be built out and cheap oil was available from newly tapped Texas oil fields — that internal combustion cars began to take over as the predominant vehicles across the United States.

Analysts estimate the EVs will be cheaper to buy than internal combustion cars as soon as 2022. Beyond that, it's probably only a matter of two decades before EVs represent the majority of cars, light trucks and SUVs plying American roads.

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