In 2021, Citizens United for Consumer Sovereignty, a South Korean consumer group, said the driving range of most EVs drop by up to 40 per cent in cold temperatures when batteries need to be heated, with Tesla suffering the most, citing data from the country’s environment ministry.
Last year, the KFTC fined German carmaker Mercedes-Benz and its Korean unit 20.2 billion won for false advertising tied to gas emissions of its diesel passenger vehicles. The challenge for electric vehicle performance in extreme temperatures is widely known, though EVs are popular in markets like Norway, where four out of five vehicles sold last year were battery-powered, led by Tesla.
A 2020 study of 4,200 connected EVs of all makes by Canada-based telematics provider Geotab found that most models had a similar drop in range in cold weather, primarily because the battery is also used to heat the car for the driver and passengers. At just above 20 degrees Celsius, the average EV outperformed its stated range, but at minus 15 degrees the average EV had only 54 per cent of its rated range, the study found.
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