How much range EVs really lose in a Canadian winter

CAA's large-scale Canadian winter test drove 14 EVs in freezing conditions until they died. Range loss versus official NRCan ratings ranged from 14% to 39%. For context, gas engines also lose roughly 15% efficiency in cold weather - so the best-performing EVs matched gas cars.

We do not republish CAA's per-model percentages as if they were our own tests. The band above is the sourced result. Heat pumps, battery preconditioning, highway versus city driving, and cabin heat all move a given car along that 14–39% range. We do not have a sourced heat-pump flag on every catalogue trim.

These are official NRCan ratings from our catalogue, scaled by CAA's low and high loss. They are not CAA's measured km for each model.

Over 65% of Canadian EV owners polled reported noticeably lower range in extreme cold. CAA testing measured 14–39% below official ratings depending on the model.

Threads on r/EVCanada often cite closer to 50% in prairie deep-freeze highway driving. That is a useful planning anecdote, not a second CAA result. If your commute is highway-only at −30 °C, plan toward the worse end of the band and keep a 20–30% arrival buffer.

What helps: Precondition the cabin while plugged in, use seat heaters over cabin heat, and plan winter trips with a 30% buffer. Heat-pump-equipped models fare better.

• First winter with an EVPreheat plugged in, winter tires, and a 20–30% highway buffer.
• EV maintenance & winter notesTires, 12V battery, and the same CAA winter figures on the service page.
• Cost calculatorWinter does not change the kWh price - it changes how many kWh you use.