Study: power reserve of electric vehicles declines to 40% at low temperatures

A new study of the condition of the reserve of electric in the winter has shown that heating of the passenger compartment of the electric vehicle when the temperature outside drops below zero degrees, dramatically reduces the cruising range of the car and leads to significant power consumption.

The study was conducted by AAA, tested five popular electric vehicles at three different temperatures with and without use of heating, ventilation and air-conditioning.

The study involved electric cars: BMW i3s, the Chevrolet Bolt EV, the 2018 Nissan Leaf, Tesla Model S 75D and the Volkswagen e-Golf 2017. For each model, the power reserve and the energy savings were tested at -7°C, 24°C and 35°C, with enabled and disabled with the climate system.

“Winter” charging of the electric vehicle Kia Soul © hevcars.com.ua

In tests it was found that the decrease in temperature to -7°C and turning on the heat the passenger compartment, the power reserve on average was reduced by 41%.

When the climate system was not used, the reserve for electric vehicles was reduced to a lesser degree: 12% at -7 °C and 4% at 35 °C without the use of conditioner (and the cooling of the interior of the reserve has decreased by 17%).

That is, it can be concluded that heating of the passenger compartment reduces the cruising range of electric vehicles more working air conditioner.

In addition, the researchers came to the conclusion that in winter the use of the climate system entails additional costs for the use of the electric vehicle. So the inclusion of heating at -7°C increases the cost of operation of the electric vehicle is 65 %, which is much greater than with the use of air conditioning at 35°C when operating costs increased only 21%.

In more detail, about the problems of using electric car in winter and their solutions, we wrote in our recent article.

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