An electric car charges in B.C. (Black Press Media files)

Cold weather can cut electric car range over 40 per cent: study

The automobile club tested the cars at -6.7 C and 35 C

Cold temperatures can sap electric car batteries, temporarily reducing their range by more than 40 per cent when interior heaters are used, a new study found.

The study of five electric vehicles by AAA also found that high temperatures can cut into battery range, but not nearly as much as the cold. The range returns to normal in more comfortable temperatures.

Many owners discovered the range limitations last week when much of the country was in the grips of a polar vortex. Owners of vehicles made by manufacturers including Tesla, the top-selling electric vehicle company in the U.S., complained on social media about reduced range and frozen door handles during the cold snap.

“As long as drivers understand that there are limitations when operating electric vehicles in more extreme climates, they are less likely to be caught off guard by an unexpected drop in driving range,” Greg Brannon, AAA’s director of automotive engineering, said in a statement.

AAA tested the BMW i3s, Chevrolet Bolt and Nissan Leaf from the 2018 model year, and the 2017 Tesla Model S 75D and Volkswagen e-Golf. All have a range of at least 100 miles per charge. They were tested on a dynamometer, which is like a treadmill, in a climate-controlled cell.

The automobile club tested the cars at -6.7 C and 35 C, comparing the range to when they were tested at 24 C, according to a report on the study.

At -6.7 C, the average driving range fell by 12 per cent when the car’s cabin heater was not used. When the heater was turned on, the range dropped by 41 per cent, AAA said.

At 35 C, range dropped 4 per cent without use of air conditioning, and fell by 17 per cent when the cabin was cooled, the study found.

For example, AAA’s testers determined that the Tesla’s range when fully charged at 24 C was 239 miles, but it fell 91 miles, or 38 per cent, at -6.7 C.

In a statement, Tesla disputed the AAA results. The company said that based on data collected from its cars on the road, “the average Model S customer doesn’t experience anywhere near that decrease in range.” The company said the range dropped by roughly 1 per cent at 35 C, but it would not release a percentage for cold weather.

AAA said it followed test procedures drawn up by SAE, an auto engineering trade group.

When the temperature tumbled to 20 degrees last week in Hickory, North Carolina, near Charlotte, Jason Hughes noticed the range fall when he drove his Tesla Model 3 on the commute from home to work.

“It would easily use double the amount of power for that 15-mile trip,” said Hughes, who owns four Teslas and runs a business that refurbishes and sells salvaged Tesla parts.

The cars use energy to heat the battery coolant in cold weather, as well as for heating the cabin, Hughes said. Range would take a hit mainly for short trips, and the decrease wouldn’t be as large on longer trips once the battery and cabin are heated, Hughes said.

“It’s definitely an issue,” he said. “If you want to go somewhere far in the cold, you’re going to be using more power.”

Range would be reduced further by extreme cold in northern states, he said.

AAA recommends that drivers heat or cool their cars while still plugged in to a charging station. It says electric cars can still be used in extreme climates with a little extra planning.

Tom Krisher, The Associated Press


Like us on Facebook and follow us on Twitter.

Just Posted

Sister of teen gunned down in 2014 aims to keep kids out of gangs

Jessica Sherman volunteers for KidsPlay Foundation in Abbotsford

VIDEO: ‘Alarm bells’ raised by footage allegedly from Abbotsford pig farm, SPCA says

PETA released video Wednesday showing dead and injured piglets next to nursing piglets

VIDEO: Horseshoe competition coming to Abbotsford

B.C. International Highwayman Open bringing close to 100 athletes to town in May

Judge questions joint submission for Chilliwack man who sexually assaulted girl

Crown, defence ordered to find case law to back up one-year sentencing for Andrew Mullaly

Abbotsford man’s People’s Party lawsuit heading to court

Satinder Dhillon claims rights to People’s Party, now used by former Conservative renegade Maxime Bernier

VIDEO: Driver in bizarre hit-and-run at B.C. car dealership turns herself in

Police believe alcohol was a factor in incident causing estimated $15,000 in damages

‘B.C. cannot wait for action’: Top doctor urges province to decriminalize illicit drugs

Dr. Bonnie Henry says current approach in ‘war on drugs’ has criminalized and stigmatized drug users

B.C. woman, 76, challenges alcohol-screening laws after failing to give breath sample

Norma McLeod was unable to provide a sample because of her medical conditions

New report on 2017 wildfires calls for better coordination with B.C. First Nations

Tsilhqot’in National Government documents 2017 disaster and lists 33 calls to action

B.C. youth coach banned amid sexual harassment, bullying scandal: Water Polo Canada

Justin Mitchell can’t take part in Water Polo Canada events or clubs

Wilson-Raybould: Feds want to just ‘manage the problem’ of Indigenous Peoples

Former federal justice minister speaks at First Nations Justice Council meeting in B.C.

Female real estate agents warned of suspicious man in Metro Vancouver

The man requests to see homes alone with the female agent, police say

COLUMN: Keep your camping coordinates a secret this season

‘There are simply too many people in the back country,’ says Progress reporter

Most Read