Why doesn't the range match?

“This vehicle goes 500 kilometers” has become one of the most common yet misleading promises of the electric vehicle era. This is because the difference between the range written in the catalog and the range seen in real life is much more visible in electric vehicles than what users are accustomed to in internal combustion engine cars. One day the same vehicle might show 520 kilometers, while on another day it might start asking for a charge at 380 kilometers. This situation immediately raises the question in most users' minds: “Is the battery broken?” However, the issue is often not the battery itself; many variables, from air temperature to the structure of the asphalt, and from speed to tire pressure, are rewriting the range simultaneously.

In fact, fuel consumption in internal combustion engine cars never exactly matched catalog data either. However, because energy usage is seen much more clearly in electric vehicles, the difference is felt more sharply. In a gasoline-powered vehicle, even if consumption increases, the driver often does not notice it instantaneously. In an electric vehicle, even a few minutes of high-speed driving can visibly pull down the estimated range on the dashboard.

Cold weather affects more than just the battery

Air temperature is one of the factors that most severely affects the range in electric vehicles. The drop in range, especially in winter months, is not just a psychological perception; it is a direct physical reality. The first reason is battery chemistry. Lithium-ion batteries work slower at low temperatures, and the efficiency of energy transfer decreases. But the biggest blow often comes not from the battery, but from cabin heating.

In internal combustion engine vehicles, the waste heat generated while the engine is running is used almost for free to heat the cabin. In an electric vehicle, there is no such luxury. The energy required to heat the cabin is drawn directly from the battery. Especially in models without a heat pump, the effect of this on the range is felt much more severely. Moreover, since air density increases in cold weather, aerodynamic drag also rises. In other words, the vehicle spends more energy not only to heat the interior but also to stay on the road.

For example, a vehicle with a 500-kilometer WLTP range can drop to the 300-350 kilometer band in real-life highway use at high speeds during winter months. Moreover, the reason for this is often not a problem with the battery, but the change in usage conditions.

Asphalt is also part of the range

The invisible factors affecting range are not limited to air temperature. The road itself has a larger share in the energy consumption of electric vehicles than is thought. This is because there is a direct relationship between the condition of the asphalt and the range. Wet ground, damaged surfaces, and snow-covered roads increase rolling resistance; this pushes energy consumption upward.

The fundamental issue is the physical resistance the tire encounters while moving on the road. A tire that rolls more easily on dry and smooth asphalt demands more energy on wet or rough surfaces. On snowy ground, the picture becomes even more severe. The vehicle is not just moving forward; it is also traveling by crushing the ground. This visibly increases consumption.

It is not surprising that this effect is more visible in countries like Turkey, where road quality can change from city to city, and even from neighborhood to neighborhood. Patched asphalt, heavy precipitation, and irregular road surfaces in large cities can directly affect the real-world usage range. Behind the question users ask, “I am driving the same route, but why does the consumption change?”, these invisible physical differences often lie.

Speed, the secret enemy of electric vehicles

One of the most decisive factors on range is speed. Electric vehicles can operate extremely efficiently in the city. At low speeds, some of the energy is recovered thanks to regenerative braking, and consumption decreases. However, as speed increases, the picture quickly reverses. Especially when exceeding the 130-140 km/h band on the highway, energy consumption can increase dramatically.

The main reason for this is aerodynamic drag. As speed increases, the cost of cutting through the air grows exponentially. In internal combustion engine vehicles, this situation is reflected in fuel consumption, but in an electric vehicle, the driver sees this much more directly. Because high speed does not just increase consumption; it also pulls down the remaining range on the dashboard in the blink of an eye. That is why many electric vehicle users see quite low consumption values in the city, but have to take charging breaks much more often than they expected during long highway journeys.

Tire pressure, load, and small details

Tires are also among the elements that often remain in the background in the range equation but have a major impact. Low tire pressure increases rolling resistance and causes the vehicle to consume more energy. The type of tire used is at least as important as this. Low rolling resistance tires developed specifically for electric vehicles can make a positive contribution to the range. Conversely, wide-base performance tires or choosing the wrong seasonal tires can push consumption upward.

Extra loads on the vehicle similarly increase energy demand. Roof boxes, bicycle carriers, and even driving with windows open can disrupt the aerodynamic structure and pull the range down. Especially at highway speeds, aerodynamic differences that seem small can turn into large energy losses.

Traffic is not always a disadvantage

Interestingly, traffic does not always create a disadvantage. While internal combustion engine cars generally become inefficient in heavy traffic, electric vehicles can be more advantageous in stop-and-go usage. This is because some of the energy generated during braking is transferred back to the battery. That is why it is possible for some electric vehicles to approach their catalog data in the city.

Still, factors such as air conditioning usage, hot weather, and moving at low speeds for a long time can limit this advantage. In short, city driving does not always automatically mean ‘high range’.

What can be done to increase the range?

It is not possible to completely eliminate range loss in electric vehicles. However, usage habits can change consumption significantly. Especially on long journeys, even a few small choices can make a noticeable difference in range.

Using a constant and reasonable speed: High speed can dramatically increase consumption in electric vehicles. Especially on the highway, moving in the 110-120 km/h band instead of 140 km/h can visibly increase the distance that can be traveled on a single charge.

Heating or cooling the cabin while charging: Thanks to the “pre-conditioning” system found in many electric vehicles, the cabin can be brought to the desired temperature while the vehicle is charging. Thus, the extra energy drawn from the battery in the first part of the journey can be reduced.

Checking tire pressure: Low tire pressure increases energy consumption by increasing rolling resistance. Especially before a long trip, checking for the correct tire pressure can make a direct contribution to the range.

Avoiding sudden acceleration: The high torque of electric vehicles makes driving enjoyable. However, frequent and harsh acceleration can significantly increase consumption. Smoother driving also helps the regenerative braking system work more efficiently.

It is not the battery, but the conditions that are changing

In fact, with electric cars, the very concept of ‘range’ is changing in the automotive world. In the past, drivers only looked at the fuel in the tank. Now, air temperature, road surface, traffic density, speed, and driving style have become direct parts of the range. In other words, range is no longer just the result of the battery, but also a joint result of the conditions.

Probably in the near future, cars will make much more precise range estimates by analyzing not only navigation but also asphalt quality, air temperature, traffic density, and road incline in real-time. Because in the electric vehicle era, the real question in front of the driver is no longer just ‘how much energy is left’; but how far that energy can last under which conditions.