Every EV owner remembers their first cold snap. The car that comfortably did 250 miles in September suddenly reckons 180, the forums fill up with worried new owners, and someone's brother-in-law declares the whole technology a scam. Calm down, everyone: winter range loss is real, predictable, mostly recoverable, and — this is the bit that matters for this site — its effect on your costs is much smaller than its effect on the number on the dashboard.
Where the range goes
Three things happen in the cold. First, the chemistry: lithium-ion batteries are sluggish at low temperatures, so the car warms the pack and limits how hard it can be worked, costing some efficiency. Second — and this is the big one — cabin heating. A petrol engine heats the cabin with waste heat; it's making a furnace's worth of it anyway. An EV has no waste heat to spare, so every degree comes off the battery. A resistive heater can draw 4–6 kW; on a short urban trip, heating the cabin can use nearly as much energy as moving the car. Third, the small stuff: denser cold air, wet roads, winter tyres — each shaves a few percent.
Put together, expect 10–20% less range in a typical UK winter, and up to 30% for short hops in a proper freeze. Cars with heat pumps (increasingly standard) sit at the better end; older resistive-heated cars at the worse end.
What it actually costs you
Here's the reframe: range anxiety is about the dashboard number, but your wallet only cares about pence per mile. Say you normally get 3.8 miles per kWh and winter knocks you down to 3.0. Charging overnight at 7p per kWh, your cost per mile goes from 1.8p to 2.3p. Over a 1,000-mile winter month, that's about £5 extra. On a standard 26p tariff it's nearer £18 extra. Annoying, but nobody's budget is breaking — and a petrol car's winter consumption rises too, which people rarely notice because nobody displays it on a big screen.
Winter matters far more if you rely on public rapid charging: you're paying 75p+ per kWh for those extra winter kWh, and rapid charging itself slows in the cold, so you pay more and wait longer. Cold-weather efficiency is one more argument for getting your charging mix as home-heavy as you can.
The habits that claw it back
- Pre-heat while plugged in. Warming the cabin and battery from the mains before you set off is the single best winter habit — the heating energy comes from the grid at home rates, not from your range. Every EV app does this; set a departure schedule and forget it.
- Use the seat heaters. Heating a person directly takes a tenth of the energy of heating the whole cabin. Seat heater plus 18°C beats no seat heater plus 22°C.
- Slow down a little on motorways. 65 mph instead of 70 in cold, wet weather recovers a surprising slice of range — drag is already worse in dense winter air.
- Keep some charge for the battery's sake. Charging from very low in freezing weather is slow; staying in the 20–80% band keeps the car happier and the charging speeds up.
- Don't panic-buy a bigger battery. If you're choosing a car, check the winter range covers your worst regular day with a margin — not your best summer day. That's usually a smaller (cheaper) battery than the showroom suggests.