As we shift into autumn, range between charges naturally dips — but it’s not just the colder temperatures. Analysis of ClearWatt battery health testing data across thousands of EVs has revealed how speed, HVAC use, wheel/tyre choices, battery chemistry, and whether a car has a heat pump can all nudge real-world range up or down. The good news? A bit of prep goes a long way.
Why prep matters: Cold, dense air and cabin heating raise consumption; fast motorway cruising magnifies it. Add in aero-heavy wheels or soft tyre pressures and your winter margin shrinks faster than you think. Advanced preparation helps your drivers stay on schedule without adding stress at the charger.
Here's five quick wins your drivers can act on:
Pre-condition on the plug. Warm cabin and battery before departure so energy comes from the grid, not the pack.
Heat the person, not the cabin. Use seat/steering heaters first; keep temperature moderate.
Set steady speeds. Aim for smooth driving and sensible motorway pace to curb aero losses.
Build a buffer. Plan routes with a backup rapid and target 10–15% arrival SoC.
Tyres & trim. Check pressures monthly and, where range matters, favour efficient wheels/tyres.
A bonus policy tweak: In temps ≤7°C, apply a conservative winter derate in planning tools and require drivers to pre-condition while plugged in.