Does a heat pump really help your EV in winter?
Petrol cars always got their heating for free
A petrol or diesel engine throws away roughly two thirds of its fuel as heat, so warming the cabin never cost anything extra. An electric motor wastes so little that every degree of warmth comes out of the battery that moves the car. Early EVs used a simple resistive heater, which turns one kWh of electricity into one kWh of heat. A heat pump runs the air conditioning backwards and pulls heat from the outside air and the drivetrain. In mild cold it delivers two to three kWh of heat for every kWh it uses.
The short version
A heat pump shines between roughly plus 10 and minus 5 degrees, which is most of the European cold season.
At minus 10 the ADAC found no significant advantage over a plain heater.
Slow town driving costs the most heating energy per kilometre, not the motorway.
Preheating on the cable and a heated seat save more than the pump itself.
Why town driving pays the biggest heating bill
A heater uses energy per hour, but consumption is measured per kilometre. The same 3 kW that adds about 2.5 kWh per 100 km at a steady 120 km/h adds 10 kWh per 100 km when you average 30 km/h through town. The ADAC saw that pattern in its tests: a 23 km trip at minus 7 degrees used 70 percent more energy on average than at plus 23, while over 100 km at 0 degrees the penalty was 21 to 30 percent.
So the car that lives on school runs and supermarket trips pays the highest heating cost per kilometre, and it never runs long enough to warm itself up. That is the driver who gains most from a heat pump. On the motorway the motor already makes waste heat the system can recover, so the pump matters less.
Why the advantage fades in a real freeze
A heat pump harvests heat from the outside air. The colder that air, the less heat there is to collect and the harder the compressor has to work, so the output per kWh slides from about three towards one. Below about minus 10 the outdoor heat exchanger also frosts up, and the system has to defrost itself now and then. Most makers keep a resistive heater alongside the pump for exactly this weather.
When the ADAC tested seven electric cars in a cold chamber at minus 10, the heat pump cars showed no significant efficiency advantage. That is normal, not a fault. The brochure's 'up to 30 percent more winter range' is the best case on a mild day, not a January average.
Preheat while the car is plugged in
The best heating trick has nothing to do with the hardware. Set a departure time while the car is on the charger, and the energy to warm the cabin comes from the wall instead of the battery. The ADAC says about 15 minutes is enough. A full preheat of a VW ID.3 costs around one euro of electricity, and you leave with the range you had. A warm car also gives battery preconditioning a head start on the way to a fast charger. One catch: preheating from the app while the car is unplugged simply uses the battery earlier.
Heat yourself, not the whole cabin
A heated seat draws around 50 to 100 watts and a heated steering wheel even less, while the cabin heater at full effort pulls as much as a kettle, continuously. On a chilly morning, seat, wheel and a low fan keep most drivers comfortable for a fraction of the energy. That is why Hyundai and Kia fit a Driver Only button, and other brands hide a single-zone or eco setting in the menus.
Ask for 20 or 21 degrees rather than 24, because the system chases that target with whatever power it takes. Recirculation helps too, since reheating air at 18 degrees is cheaper than heating fresh air at 3, but only for a few minutes at a time before the windows fog up.
Does the used EV you want have one?
From roughly 2019 to 2023 the heat pump was a paid option on several of Europe's best-selling EVs. Volkswagen asked about 1,250 euros for it on the ID.3 in Germany, and Skoda and Cupra did much the same on the Enyaq and the Born. Tesla only added it to the Model 3 with the October 2020 update, while Renault fitted one to the Zoe as early as 2012.
You cannot see it from the driver's seat. Ask the seller for the original order sheet, or have a dealer print the equipment list from the VIN, and look for heat pump, Wärmepumpe or pompe à chaleur. On a cold morning the pump is worth a few dozen kilometres of range, so it belongs in the price, just like the battery health report you should already ask for.
How to keep your EV warm for less
Set a departure time and preheat while the car is still plugged in. About 15 minutes is enough.
Heat the seat and the steering wheel first, and the air second.
Ask for 20 or 21 degrees, not 24.
Use Driver Only or single-zone climate when you drive alone.
Expect the biggest range drop on short trips and in town, not on the motorway.
Mostly short town trips and no charger at home? A heat pump is worth paying for. Mostly motorway? It is a comfort, not a necessity.
Buying used? Check the equipment list by VIN for a heat pump.
Frequently asked questions
Why does my EV still lose range with a heat pump?
Because heating is only part of the winter penalty. A cold battery gives up less of its energy and accepts less regenerative braking, and cold air and winter tyres add resistance. In the ADAC's motorway winter test, cars that all had heat pumps still used 25 to 31 percent more energy at 0 degrees.
Can a heat pump be retrofitted?
In practice, no. It is a different refrigerant circuit with its own valves, heat exchangers and software, designed in at the factory, and no European manufacturer offers it as a dealer retrofit. If you want one, it has to be on the car when you buy it.
Does the heat pump also warm the battery?
On most current designs, yes. The same circuit warms the battery before a fast charge and can use waste heat from the motor to do it more cheaply. That is why cars with a well-integrated heat pump tend to precondition faster and hold higher charging power in the cold.
Does a plug-in hybrid need a heat pump?
Most plug-in hybrids heat the old way: on a cold morning the petrol engine starts even in electric mode, just to warm the cabin. That is the main reason their electric range shrinks in November. The best habit is the same as in an EV: preheat on the cable before you unplug.
