Winter range is one of the first things prospective EV owners worry about, and for good reason: an electric car will normally travel fewer miles on a charge in cold weather than it will in mild conditions.
There is no honest single percentage that applies to every EV.
A short winter journey can look particularly inefficient because the cabin and battery may need warming from cold. A long journey gives those initial energy costs more distance to spread over. Different cars also manage battery temperature and cabin heating in different ways.
Why cold weather affects range
The battery itself is less efficient when it is cold. At the same time, the car is being asked to do more work.
In a petrol or diesel car, a lot of engine heat is effectively a by-product. An EV has much less waste heat available, so warming the cabin uses energy that could otherwise have gone towards moving the car.
Cold weather often arrives with other range-unfriendly conditions too: wet roads, denser air, stronger winds and more use of lights, demisters and heated systems.
Short trips can look worse than long trips
Imagine two owners setting off at the same temperature.
The first drives five miles to work. A meaningful chunk of the energy used during that trip may go into warming the cabin and battery.
The second drives 150 miles. The car still has to warm itself at the beginning, but that initial cost becomes a much smaller part of the total journey.
This is one reason simple statements such as “EVs lose 20% in winter” are too crude to be genuinely useful.
Does a heat pump help?
A heat pump can reduce the energy needed to heat the cabin in many conditions, but it does not make winter losses disappear. Its benefit also varies with temperature, journey length and the rest of the car's thermal-management system.
When comparing two models, owner data is more useful than assuming one specification line tells the whole story.
What should you use when planning a winter trip?
If a journey really matters, plan using a conservative real-world figure rather than the best number you have ever seen on the dashboard.
Motorway driving in cold weather is a particularly useful figure to look for because sustained higher speed and low temperature can both pull the range down.
MyEVRange separates cold, average and hot owner journeys so a summer average does not hide what happens in January.
Preconditioning helps, but it is not magic
If the car is plugged in, preheating the cabin before departure can make the first part of the journey more comfortable without taking all of that energy from the traction battery.
Some cars can also prepare the battery for charging or driving. The exact behaviour varies by model, so it is worth learning what your own car supports.
What we want to measure
The useful question is not “how much range do EVs lose in winter?”
It is:
How much range does this particular EV lose in the sort of winter driving I do?
That is why MyEVRange collects the conditions alongside each journey. As the database grows, we can compare the same model in cold, average and hot weather instead of relying on one headline figure for the whole year.
