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

Town of Eckville to see new waste collection service provider

Council decided at their regular meeting April 23 the new provider would take over July 1

Strathcona County RCMP charge Eckville man for firearms, drugs

RCMP found the suspects at a high risk traffic stop on April 11 as a result of a 911 complaint

Eckville Mayor interested to see what’s to come with new government

Mayor Helen Posti says Eckville is “very lucky” to have MLA Jason Nixon re-elected

Alberta’s 47 legislature newbies meet under the dome for orientation day

Most new members are with the United Conservatives, who won a majority government

Annual Home and Lifestyle Show coming to Sylvan Lake

The inaugural event will showcase local businesses at the NexSource Centre’s curling rink on May 11

VIDEO: Police dog in Oregon struck by 200 porcupine quills during pursuit

The German shepherd had to be sedated and was in treatment for more than two hours

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.

Oil and gas company confirms death of one of its employees in Yoho avalanche

Dana Coffield died when he was skiing in the Rocky Mountains

Cenovus CEO estimates production curtailments will deliver billions to taxpayers

The curtailment program started Jan. 1 was designed to keep 325,000 barrels per day off the market

Robbery in Leduc County estimated at $40,000

Leduc RCMP investigate break and enter and theft of firearms

Singh says childhood abuse steeled him for scrutiny and stress of politics

He recounts the assaults for the first time in his book Love & Courage

Despite five extra weeks’ parental leave in Canada, dads still face stigma: survey

One reason people said dads don’t need leave is because they can just bond with their kids at weekend

Calgary’s public school board responds to Syrian child’s suicide after bullying

Amal Alshteiwi, a newcomer to Canada from Syria, took her own life several weeks ago

Child, 11, accidentally shot in the chest at Alberta religious colony

Child taken from Hutterite colony to nearby hospital

Most Read