Wirelessly Charging Electric Cars Cost Energy

Being able to wirelessly charge an electric car is very convenient compared to plugging it in, but it also means it will cost more in terms of energy needed.

Published: 10-Jan-2014

In case plugging in your electric car is too much effort, wireless charging is on the way. It means convenience—but at a cost.

With wireless charging, electricity goes through a coil, creating an alternating magnet field. Another coil, located on the car, picks up that magnetic field and turns it back into electricity, charging the car. And there’s the rub.

“It’s going to be less efficient,” said Esmond Snell, senior research associate at E Source, a strategic partner of NRECA’s Cooperative Research Network.

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