RANGE,
EXPLAINED.

A gas gauge only answers one question: how much fuel is left?

An EV range estimate answers a different question: how far can you go with the energy that's left?

That makes EV range fundamentally different. The vehicle is not just measuring what's left in the battery. It is also estimating how efficiently you'll use it.

Your battery stores energy, measured in kilowatt-hours (kWh), the way a fuel tank stores litres. But the dashboard does not show you energy. It shows you distance. To estimate that distance, the vehicle has to make a prediction about how much energy you are likely to use over the kilometres ahead.

Range is a combination of two things:

• How much usable energy remains in the battery
• How efficiently the vehicle expects to use it

The second part never sits still.

A simple example:

• Battery remaining: 58 kWh
• Expected efficiency: 20 kWh/100 km

The vehicle estimates: 58 ÷ 20 × 100 = 290 km

That 290 km is not physically stored inside the battery. It is a forecast based on current conditions and recent driving.

If your efficiency improves, the estimate can rise. If your efficiency worsens, it can fall. The battery may contain the same amount of energy, but the prediction changes because the car's expectations have changed.

A full charge reading 400 km that becomes 372 km on a cold morning is usually not a problem. It is the vehicle looking at colder conditions and revising its forecast.

Think of a full charge as a daily energy budget. Every system you use makes a withdrawal, and one of the largest is maintaining a comfortable cabin temperature.

EVs generally perform best in moderate temperatures. Outside that range, more energy is spent managing heat and efficiency drops.

In winter, the battery is less efficient, the cabin needs heating, and the vehicle may also use energy to warm the battery itself. CAA's 2025 winter test drove 14 popular EVs between Ottawa and Mont-Tremblant in real Canadian winter conditions. Range losses varied from 14% to 39% depending on the vehicle and its thermal systems. Read the full cold-weather breakdown →

In summer, the effect is usually smaller, but air conditioning and battery cooling systems still consume energy, especially on long highway drives or during heat waves.

One of the most effective winter habits is using heated seats and a heated steering wheel whenever possible. They provide comfort while using far less energy than heating the entire cabin.

Temperature gets most of the attention. Speed often has the bigger impact.

As speed increases, aerodynamic drag rises quickly. The faster you drive, the harder the vehicle works to push through the air.

Geotab's analysis found that reducing highway speeds by roughly 15–25 km/h increased range by 20–30%, depending on the vehicle.

That makes speed one of the most powerful levers you have over real-world range.

Highways are where range disappears fastest. When you are between chargers and every kilometre matters, small reductions in speed can make a meaningful difference in arrival range.

Wind can also amplify this effect. A headwind reduces efficiency in a similar way to driving faster, while a tailwind can improve it.

Drivers often focus on the battery and forget about the road ahead.

Climbing hills uses extra energy, which can make range drop faster than expected. Descending allows some of that energy to be recovered through regenerative braking.

Weather also plays a role. Rain, snow, slush, and wet roads all increase rolling resistance, meaning the vehicle must work harder to maintain speed.

This is why range estimates can shift during a drive. The car is continuously updating its prediction based on what is happening in real time.

It also explains why two identical EVs can show different range on the same day.

The range figure on a vehicle's window sticker comes from standardized testing designed to allow fair comparisons between vehicles.

These tests are useful, but they cannot replicate your exact driving conditions, including weather, speed, terrain, passengers, cargo, and traffic.

A controlled test is not your Tuesday commute in February.

Treat the sticker number as a reference point under favourable conditions, not a guarantee for every drive. Some days you will exceed it. Other days you will fall short. Both outcomes are normal.

Your range estimate is not static. It adapts based on your recent driving and conditions.

Drive gently for a week and the estimate may become more optimistic. Spend several days on cold highways and it may become more conservative.

One thing that surprises new EV owners is that range can sometimes increase.

You might drive 10 km and lose only 7 km of estimated range. You might park overnight and see the estimate rise slightly on a warmer morning.

That does not mean the battery gained energy. It means the forecast was updated.

The most useful number on your dashboard is often efficiency, usually shown as kWh/100 km or km/kWh.

A single trip can be misleading. A rolling average over several days gives a much more accurate picture of real-world performance.

A simple way to learn your EV:

• Reset the trip meter
• Drive a familiar route
• Compare distance travelled with energy used

Within a few weeks, most drivers develop an accurate sense of how far their vehicle will go in their own conditions.

That is often when range anxiety begins to fade.

Precondition while plugged in. Warm or cool the cabin before departure so energy comes from the wall, not the battery.

Use heated seats and steering wheel. They provide comfort with far less energy than heating the entire cabin.

Use eco mode when appropriate. It reduces energy demand from acceleration and climate systems.

Keep tires properly inflated. Pressure changes with temperature. Under-inflated tires increase rolling resistance and reduce efficiency.

Slow down when range matters. On highway trips, even small reductions in speed can have a meaningful impact on arrival range.

Focus on averages, not moments. One cold trip or one windy day does not define your EV's capability. Patterns matter more than single drives.