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Energy efficiency of electric vehicles can be as high as 90%, while efficiency of IC Engines is about 25%.
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Modern vehicles with IC Engines waste most of the fuel as heat, and only a small fraction reaches the wheels.The net result is that only around 20% of the energy that’s pumped into the fuel tank ends up at the wheels.
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According to the Department of Energy (DOE), in an EV, about 59-62 percent of the electrical energy from the grid goes to turning the wheels, whereas gas combustion vehicles only convert about 17-21 percent of energy from burning fuel into moving the car.
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https://cleantechnica.com/2018/03/10/electric-car-myth-buster-efficiency/
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The various energy losses in an EV add up to 31% to 35%. Regenerative braking adds 22% back into the system, making the overall efficiency around 87% to 91%.
