![]() The window sticker range estimates assume 72 degrees F. Other examples cited in an SAE presentation include a 10% reduction in range loss at 95 degrees F, from 25%-30% without preconditioning to 15%-20% after preconditioning. The effect of precondition will vary depending on vehicle technology, actual temperature and other factors, but preconditioning makes a big difference in all cases. “Conditioning the vehicle before driving can play a significant role in vehicle range on short trip driving in cold weather (20%)," the presentation states with typical engineering understatement. Preconditioning while plugged in reduces the impact to 10% to 30%. In a short trip at 20 degrees F without preconditioning, range can fall 30% to 50% from the EPA projection on the window sticker, according to estimates in J1634. Preconditioning while plugged in versus heating the cabin from the battery while driving can make a tremendous difference in cold-weather range. More: 4 things to know before you buy an electric vehicle More: 2024 GMC Hummer electric SUV is radically engineered. We’re also quantifying the amount of wall energy used by plugged preconditioning,” so owners can check their electric bill to see just how much they save by preconditioning with electricity from a wall outlet than charging at a more expensive commercial charger. ![]() “The new standard compares the effect of wall-conditioning on the cabin and battery. “You greatly reduce the climate control system’s impact by powering while you’re plugged into the grid,” Roos said. The process doesn’t require much more planning than millions of people already do with remote starters on cold mornings and hot afternoons. ![]() That also makes the vehicle’s battery more efficient, by warming it to optimal temperature. For maximum driving range, owners should use a remote or program the vehicle to precondition interior temperature while it’s plugged in. ![]()
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