Electric car range: what does the real distance depend on?
In mild weather and city traffic, the same electric car can travel up to 30-40 percent further on a charge than on the motorway in winter. This gap between the official figure and the real experience is what makes many people unsure. Yet the catalogue value is not false: it simply refers to standardised test conditions, which rarely match your everyday life. The range of an electric car is not a fixed number but a span, and that span can largely be planned.
On the Voltie blog we cover the practical side of driving electric. In this article we go through what affects the distance you can cover the most, why the motorway uses so much more energy, why range matters less in everyday life than you might think, and how to plan a longer trip safely.
The starting point is always the battery capacity, given in kilowatt-hours (kWh). On its own, however, this says little, because what matters is how much energy you use per 100 kilometres. The size of the battery alone does not decide how far you get: where and how you drive matters at least as much. Five factors move this the most.
● Speed: air resistance grows with the square of speed, so consumption on the motorway is much higher than in town. This is the single largest item, and also the one that is easiest to change.
● Outside temperature: in the cold the battery delivers less energy, and the heating also runs from the battery. In summer the air conditioning puts a similar load on it, but usually to a smaller degree.
● Driving style: hard acceleration and late braking take a lot. Anticipatory driving pays off even more in an electric car than in a petrol one, because slowing down also recharges energy.
● Type of route: climbing uses energy, while going downhill partly recharges it through regenerative braking. In city traffic, the frequent slowing down actually helps consumption.
● Load: cargo, the number of passengers and especially a roof box noticeably increase consumption, because they worsen aerodynamics.
A simple calculation helps you get your bearings. If your car uses 18 kWh per 100 kilometres on average and has 60 kWh of usable capacity, that is roughly 330 kilometres in theory. In winter, on the motorway, calculating with 24 kWh/100 km, the same comes to only around 250 kilometres. There is no contradiction between the two figures: they simply refer to different conditions.
It is worth comparing the real, measured consumption and range values of different models on the EV Database data sheets, where city, combined and motorway values are listed separately. This is a much more useful basis for comparison than the official figure, because it is produced with the same method for every model.
This is the point where the electric car is the opposite of a petrol one. A combustion engine wastes the most in town, because it runs even when standing still, and when braking all the energy turns into heat. An electric car, on the other hand, uses practically nothing when standing still, and when slowing down regenerative braking returns part of the energy to the battery.
On the motorway this gain disappears: there is no meaningful slowing down to recover energy from, and because of the sustained high speed, overcoming air resistance takes most of the energy. Since air resistance grows with the square of speed, a kilometre driven at 130 km/h costs much more energy than one at 90 km/h.
The numbers show this clearly. A car that uses around 15 kWh/100 km in town can easily go up to 22-25 kWh/100 km on the motorway. The same 60 kWh battery thus allows roughly 350-400 kilometres in town, but more like 250-280 kilometres on the motorway. That is why the same car is most efficient in town and most wasteful at a sustained high pace.
In practice, for most users the range of an electric car stops being a problem because daily use actually consists of short distances. For someone who drives 50-60 kilometres a day, a battery of roughly 60 kWh is enough for several days, and it never gets close to running flat.
This is the essence of the switch: an electric car is not used like a petrol car. You do not charge when the tank is empty, but when the car is standing anyway. With home charging you start practically every morning with a full battery, so the question of daily range never even comes up.
Charging speed is rarely the bottleneck here. With a 22 kW AC charger, most cars can be charged for daily use in a few hours, typically 3-5 hours, which fits easily into the night. Meanwhile, dynamic load management takes the household's current consumption into account and adjusts the charging power to it, so the main fuse does not trip even if the air conditioning or the oven switches on. This requires an external smart meter, available as a separately ordered accessory.
With a solar system the picture gets even better. If charging partly comes from your own generation, that also reduces costs. Voltie's Green mode charges exclusively from the solar surplus, while in Eco mode you can set at how many amps of feed-in charging should start.
On a longer trip the situation is different, but even there the formula is simpler than it first seems. The goal is not a full charge, but enough energy for the next leg. Fast chargers work most efficiently in the range between 10 and 80 percent; above that, charging slows down noticeably, so a shorter stop is typically worth more than a long one.
A practical point for everyday use: with most cars, to protect the battery it is worth stopping daily charging at around 80 percent and keeping 100 percent for before long trips. This can also be set in the Voltie app.
On a longer trip the range of an electric car really does matter, but most of the uncertainty can be removed with a few decisions made in advance. Three things are worth thinking through before you set off.
● Charging points: plan in advance where and when you will charge. It is worth choosing two points per route, so you have a backup if one is occupied or out of order.
● Route characteristics: terrain, expected speed and temperature together determine consumption. For a mountain or winter trip, allow a larger margin.
● State of charge at departure: when you set off, the car should be at the most favourable state of charge possible. With a home charger this needs no extra organising: you just plug the car in in the evening.
A few simple habits can improve your real range a lot. In winter it is worth preheating the cabin from the grid while the car is still charging, so the heaviest heating load does not come from the battery. On the motorway, 110 km/h instead of 130 already makes a noticeable difference. Checking tyre pressure regularly also matters more than you would think, and the roof box should come off the car when you do not need it.
On the technology side, transparency helps the most. In Voltie's own app you can follow charging data and energy usage statistics, so after a few weeks you can see exactly what your real consumption is. This is a much more useful starting point than any catalogue value, because it applies to your routes and your driving style. Thanks to regular software updates, the charging system also stays up to date in the long term.
If you are interested in how electromobility has developed over the past decades, it is worth reading our article on the past and future of electric driving as well.
The question of range is therefore less and less about limits and much more about conscious planning. With a well-chosen charging setup, the distance you can cover is reliably predictable in everyday life too.
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