AC and heating in EVs: how much range do you actually lose?

Turn on the air conditioning on a hot summer day or crank up the heat in January, and your EV's range estimate will drop noticeably. This is not a fault — it is physics. Unlike a petrol car that recycles waste engine heat for free, an electric drivetrain is so efficient that it produces very little heat as a byproduct. Every watt used to warm or cool the cabin is a watt taken directly from the traction battery. This article explains how large that penalty actually is, which conditions hit hardest, and what you can do to keep the impact manageable on real European routes.

01Why climate control costs more in an EV than in a petrol car

A combustion engine converts roughly 25–30% of fuel energy into motion and wastes the rest as heat. That waste heat is essentially free cabin warmth. An EV motor, by contrast, converts around 90% of battery energy into motion, leaving almost nothing to scavenge for heating. The car must therefore run a dedicated resistive heater or a heat pump to warm the cabin, drawing directly from the same battery pack that moves the wheels.

Air conditioning is a compressor-driven process in both EV and ICE vehicles, so the penalty is more similar there — but in an EV there is no alternator or engine to absorb the load. The compressor runs off the high-voltage battery.

The practical result: in mild weather (15–20 °C) with climate off, real-world consumption figures for most cars in our catalog sit in the 163–204 Wh/km range. Switch on full heating in sub-zero temperatures and independent tests consistently show a 30–50% increase in consumption. You can model this directly in the EVStrada calculator for any route you are planning.

02How much range do you actually lose? The numbers

Rather than quoting a single percentage, it helps to look at concrete usable-battery figures alongside real-world consumption. The table below uses catalog data from EVStrada. The 'estimated winter range' column applies a conservative 35% consumption penalty — a figure consistent with real-world cold-weather testing across European conditions — on top of the listed real-world Wh/km figure.

For example, the Hyundai IONIQ 6 has a real-world consumption of 167.6 Wh/km and 74 kWh usable, giving roughly 441 km in normal conditions. Add a 35% winter penalty and that falls to around 327 km — a loss of over 110 km. The Volkswagen ID. Buzz variants, which already consume 215–242 Wh/km in normal conditions, can drop below 200 km of practical range in a cold European winter.

Use the EVStrada calculator to run a specific route like Amsterdam → Paris and see how temperature and driving style interact for your exact vehicle.

03Heat pumps: do they actually help?

Many modern EVs — including several in the EVStrada catalog — offer a heat pump as standard or as an option. A heat pump does not generate heat from electricity alone; it moves heat from the outside air into the cabin, achieving a coefficient of performance (COP) of roughly 2–3 in mild cold (around 0 °C). That means for every 1 kW of electrical input, you get 2–3 kW of heating output.

The catch is that heat pump efficiency drops sharply below about −10 °C, at which point most systems fall back to resistive heating anyway. In a typical northern European winter — think Oslo, Stockholm, or Helsinki — you will still see significant range loss even with a heat pump, just not as severe as without one.

In practice, a heat pump can reduce the cold-weather consumption penalty from around 35–50% down to roughly 15–25% in temperatures between −5 °C and 5 °C. That is a meaningful real-world difference on a long route. Check your vehicle's specification sheet to confirm whether a heat pump is fitted — it is not always standard on base trims.

**Practical takeaway:** If you regularly drive in temperatures below 5 °C, verify that your trim level includes a heat pump before purchasing. The range difference over a winter season is substantial.

04AC in summer: a smaller but still real penalty

Cooling the cabin in summer is less damaging to range than winter heating, but it is not free. At 35 °C ambient temperature with full air conditioning, expect a consumption increase of roughly 10–20% compared with a mild-weather baseline. For a car like the Volkswagen ID.3 consuming 163 Wh/km normally, that translates to an extra 16–33 Wh/km — or roughly 20–40 km of range lost on a full charge.

The reason the summer penalty is smaller is twofold: first, battery chemistry performs better at warmer temperatures (within limits), partially offsetting the AC load; second, the energy required to cool a cabin is generally less than the energy required to heat one from sub-zero temperatures.

One practical strategy for summer driving is pre-conditioning the cabin while still plugged in at home or at a charger. This cools the car to your target temperature before you leave, so the AC system has less work to do once you are on the road and drawing from the battery.

**Practical takeaway:** Pre-condition your cabin while plugged in before any journey over 100 km in hot weather. It costs grid electricity rather than range.

05Practical strategies to reduce climate-related range loss

You cannot eliminate the physics, but you can manage the impact. Here are the most effective approaches backed by how EVs actually work:

**Set a lower cabin temperature.** Every degree above 20 °C in winter costs extra energy. Dropping from 22 °C to 19 °C and using heated seats instead makes a measurable difference, because seat heaters warm occupants directly and use far less power than heating the entire cabin air volume.

**Use eco or range mode.** Most EVs limit climate output in these modes, trading some comfort for meaningful range gains on longer trips.

**Plan charging stops around climate load.** On a cold day, your buffer before a charge stop should be larger than in summer. If your normal comfortable stopping point is 15% state of charge, consider adjusting to 20% in winter to account for the higher consumption rate.

**Use the EVStrada EVStrada calculator before you leave.** It models real-world consumption figures — not WLTP — so the range estimates already reflect conditions closer to what you will actually experience. Plug in your route and vehicle to see whether you need an extra charging stop.

**Practical takeaway:** Heated seats and steering wheel are your most energy-efficient tools for staying warm in winter. Use them before turning up the cabin temperature.

06Bottom line

Climate control is one of the biggest real-world gaps between WLTP range figures and what you actually achieve on the road. A 35% consumption increase in cold weather is a reasonable planning assumption for most European EVs without a heat pump, and even heat-pump-equipped cars will see 15–25% penalties in genuinely cold conditions. Summer AC is a smaller concern but still worth accounting for on long routes. The good news is that pre-conditioning, heated seats, and sensible charging buffers go a long way toward managing the impact. Know your vehicle's real-world baseline, plan your stops accordingly, and the range loss becomes predictable rather than surprising.