How much range do electric vehicles lose in freezing temperatures compared to summer?

At 32°F (0°C), most EVs lose 20–25% of their rated range with the heater running. At 0°F (-18°C), the loss reaches 35–45%. The three contributors are battery chemistry efficiency (biggest factor), cabin heating power draw, and increased rolling resistance from cold tyres and denser air. Vehicles with heat pumps lose 5–10% less than those with resistive heaters.

Does preheating an EV battery before driving in winter actually help?

Preheating while plugged in recovers roughly half the cold-weather chemistry penalty. At 0°F, this can mean 30–50 extra miles of range. The energy for preheating comes from the charger rather than the battery, so it costs very little. Most modern EVs support scheduled departure or app-triggered preheating. The benefit diminishes above 40°F where the chemistry penalty is already small.

Are heat pump EVs significantly better in winter than resistive heater models?

Heat pumps are 2–3 times more efficient than resistive heaters because they move heat rather than generating it. In practice, a heat pump saves 1.5–3 kW of continuous draw, which translates to 10–20% more range in sub-freezing temperatures depending on speed. The Tesla Model 3 (post-2021), Hyundai Ioniq 5, and BMW iX all use heat pumps. The general range calculator models these differences.

EV Winter Range Calculator — Cold Weather

ChargeCalcs

Calculator coming soon.