EV range in winter vs summer is one of the first things buyers ask before choosing an
electric car. The range printed on the brochure comes from lab testing at mild temperatures, so real driving often gives a different number. Cold usually costs more range than heat, but both seasons take their share. Here is how much you can lose, why it happens and what it means for drivers in Pakistan.
How to Protect Range in Both Seasons
Most of the loss comes from heating and cooling, so that is where the savings are.
- Warm or cool the car while it is still plugged in, so the energy comes from the charger and not the battery.
- In winter, use the heated seats and steering wheel instead of blasting the cabin heater.
- In summer, park in shade or a garage and avoid leaving the car at 100% charge in the sun.
- On very hot days, charging to 80% is a better habit.
- Keep tyres properly inflated and avoid high speeds on the motorway, since both waste range in every season.
Before you buy, compare the claimed range with your daily distance and keep roughly a 30% cushion. Also ask how the car manages battery temperature in 45°C summers and which cities have a service centre.
How Temperature Changes Electric Car Range
Batteries work best at around 21°C. Data from thousands of connected EVs shows that at this temperature, cars often cover about 115% of their rated range. Move away from it in either direction and the figure drops. At -15°C, the average EV delivers only 54% of its rated range, so a car rated for 400 km manages close to 215 km. At 35°C, the loss is around 17%. Cold hits harder because the cabin heater and battery warming pull power that would otherwise move the car. Heat is gentler, but the air conditioner still runs constantly, especially in slow city traffic.
Electric Car Range in Winter
Does winter affect electric car range? Yes, but the battery is not the main reason. Cold cells do deliver energy a little slower, yet the bigger drain is heating the cabin, clearing fogged windows and keeping the pack warm. EV winter range suffers most on short trips, because a large share of the energy goes into warming everything up. The loss is also temporary, and range comes back once the weather improves. If you live somewhere cold, ask the dealer whether the car has a heat pump, since it heats the cabin using less energy than a basic heater.
EV Range in Extreme Heat
EV range in extreme heat falls more slowly than in deep cold, but the drop gets steeper as the temperature climbs. The AC and the battery cooling system both work harder, and fast charging can slow down when the pack gets hot. Heat also ages a battery over the years, which affects resale value later.
Speed and road type play a part too. Hilly roads, wet surfaces and high motorway speeds all raise energy use on top of the temperature effect, so range changes from trip to trip even within the same season.
EV Battery Performance in Pakistan
Conditions here are different from the countries where most range tests are done. Summer temperatures in Karachi, Lahore and interior Sindh regularly cross 40°C, so heat is the bigger concern for most buyers. Rated range is also measured under mild lab conditions, so a car claiming 400 km may show a lower figure on the dashboard in July. Winters in these cities are mild, and you will rarely see the heavy losses recorded in freezing climates. Northern areas are the exception, where temperatures can fall below zero and winter range loss becomes a real planning issue.
Heavy traffic with the AC on full is the toughest everyday test for EV battery performance in Pakistan. A car parked in direct sun all afternoon also starts the drive with a hot battery, which means the cooling system has to work from the first kilometre.
FAQs
How to get better EV range in winter?
Warm the car while it is still plugged in and use the seat and steering wheel heaters instead of full cabin heat. Check your tyre pressure as well.
How to save EV battery in winter?
Keep the car plugged in when parked in the cold, so it can warm the battery using grid power. Also try not to let the charge drop very low.
What temperature affects EV range?
Range is best at around 21°C. It starts falling as the weather gets colder or hotter, and it drops sharply once temperatures go well below freezing.
Is EV range lower in winter or summer in Pakistan?
In colder countries, winter costs more range. In most Pakistani cities winters are mild, so summer heat and constant AC use are the bigger worry.