Four Things Cold Weather Does to an Electric Car in Sandy, Utah

Most of the range an electric car loses in winter goes into warming the people inside it. The same Department of Energy guidance reports that about two-thirds of the extra energy an EV consumes in the cold is used to heat the cabin. Take that load away and the picture changes completely: with the cabin heater off, EV efficiency is only 8 percent lower at 20 degrees Fahrenheit than at 75, and driving range about 12 percent lower. The distance between 12 percent and 41 percent is a heating bill. A gasoline car makes cabin heat out of waste engine heat it was producing anyway, so the driver never sees the cost; an electric car buys every degree from the same pack that turns the wheels.

That is also where the fix lives. The guidance recommends preheating the cabin while the car is still plugged into the charger, so the first and most expensive warm-up comes out of the wall rather than the battery, and using the seat warmers instead of the cabin heater once you are moving. On a short errand run around Sandy, that is the difference between arriving with the number you planned around and arriving well under it.

On a Wasatch Front winter morning the valley floor is often the coldest place a car will sit all day, which is the reverse of what elevation suggests. The Utah Department of Environmental Quality explains the mechanism in its inversion season FAQ: during an inversion, temperatures invert with warmer air on top of cooler air, and the mountains form a basin that traps cold air and shields it from the stronger winds that could clear the inversion out. DEQ also notes these events often follow a snowstorm, because the snow cools the ground while clear skies warm the air above it.

For an electric car parked outside in Sandy, that is not trivia. The pack cold-soaks for eight or ten hours in the coldest air in the county, and the first miles of the morning go on bringing both the cabin and the battery up to temperature. A car that sleeps in a garage starts that same morning somewhere else entirely. If yours sleeps outside, plugging in overnight and preconditioning before you unplug is the cheapest fix available, because it shifts the warm-up onto the grid. And when an inversion has settled over the valley, do not assume the drive up Wasatch Boulevard toward the canyon mouths means driving into colder air. It often means the opposite.

A canyon day costs more range than the round-trip mileage suggests, because climbing spends energy that coming back down only partly returns. Little Cottonwood and Big Cottonwood both leave the east edge of the valley and climb hard enough that the top is in a different season from the driveway you left, and every foot of that is lifted by the battery. Regenerative braking recovers part of it on the way down, which is real and worth planning for, but the Department of Energy notes that cold weather also affects the performance of regenerative braking on electric vehicles, so the descent gives back less in February than it does in September.

Two things follow. Plan a canyon trip on the charge you leave the valley with, not on the charge you expect to recover on the way home. And do not let a strong regen setting talk you out of braking properly on a long descent: when a cold or nearly full pack limits how much the motors can take back, the friction brakes do the work, and getting down SR-210 or SR-190 without cooking those brakes is a subject of its own.

Utah has a large electric fleet and a finite number of places to plug it in. The Department of Energy's Alternative Fuels Data Center counts 68,400 electric vehicles registered in Utah in 2025 against 3,208 public charging ports in the state. Those ports follow people and commerce, which means the valley has them and the canyon roads above Sandy largely do not. Plan the charge where the chargers are: a winter canyon day works better as a top-up down here before you head up than as a hopeful stop on the way home with a cold pack and the heater running. The same arithmetic shows up on a long run south on I-15, where the gaps between charging stops are longer than the gaps between gas stations, and every gap costs more in January than it does in June. When a trip turns out to be further than the car can manage in the cold, finishing it means a long distance tow rather than a roadside top-up.

An electric car that has run its main battery flat has to be carried, not pulled, and manufacturers are blunt about it. Tesla's instructions for transporters, published with the Cybertruck owner's manual, state that a flatbed truck or comparable transport vehicle is the recommended method of transporting the vehicle, that it should always be transported with all four tires off the ground, and, in capitals, that you should never transport the vehicle with the tires in a position where they can spin. The reason is mechanical rather than cautious: the motors generate power when the wheels turn, and the manual warns that in rare cases the resulting overheating may cause the surrounding components to ignite. It also notes that damage caused by improper transporting is not covered by the warranty.

A second wrinkle catches people out. Rolling an EV freely onto a flatbed normally depends on a transport or tow mode, and that mode needs low-voltage power to engage, so a car whose 12-volt system is also dead may need that system energized before it can be loaded at all. None of this resembles the conventional problem of a car that cranks slowly on a cold morning, which is its own question entirely. On which truck suits which vehicle in general, flatbed versus wheel lift walks through the comparison; for an electric car the answer is settled before anyone asks, and what you want on the way is flatbed towing and an operator who knows why the wheels stay off the ground.

The habit worth building is to stop carrying one range figure in your head all year. The July number is a summer number, and the published figures say the winter one runs far lower once the heater is on. Decide what the car has to do on a cold day, work backward from charge you actually have rather than charge you hope to recover on the descent, and precondition while the car is still plugged in. Those three moves cost nothing and take most of the surprise out of a Wasatch Front winter.

When the surprise arrives anyway, an empty pack in a trailhead lot or a car that will not wake after a cold night, it is a carry rather than a tow rope. Towing Sandy runs flatbeds across Salt Lake County for exactly that, and roadside assistance for the trouble that stops short of needing one.