Can you really earn a few extra miles in your EV by going without warm air or switching off the radio? The answer is complicated, and there are more than a few surprises.
After the motors of the drivetrain, heating and cooling the battery pack of an electric car are the biggest drains on its power reserves, says Ashley Fly, a lecturer in vehicle electrification at Loughborough University in the UK. “The energy required depends on a lot of external factors, like temperature and sunlight.
Heated seats are a far more efficient way to warm you, taking just 560 meters of range for each hour of use. “When you compare an ICE to an EV, secondary systems become more dominant,” says Clemént Heinen, attribute lead in Polestar’s vehicle development team. "Whereas an electric car is driven by an efficient motor and battery pack, ICE cars use otherwise wasted heat generated by the engine to warm the cabin. The effects of those other elements, like the climate system, become very visible.”
Drop the cruise control by a mere 2 mph to 68 mph and you get an 8.4 percent energy saving for just a 2.6 percent cut in speed. What if the car were driven slightly slower? Fry says by turning the cruise control down just 2 mph, to 68 mph, “drag power would reduce by 800 watts to 8.7 kW”—in other words, an 8.4 percent savings in energy consumption for a 2.6 percent reduction in speed.Adding passengers and luggage can affect the consumption of an electric car. But, unlike an ICE vehicle, the regenerative braking system of an EV helps undo some of the energy losses experienced when lugging around more weight.
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