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

Water Balance in the Sylvan Lake Watershed

The Sylvan Lake Watershed Stewardship Society submits a weekly column about the lake

A Beacon of Hope shines in Sylvan Lake

A fundraiser for the Safe Harbour Society to educate about opioid addiction was held on July 13

Gas prices in Sylvan Lake higher than surrounding area

The gas in town is being sold with a retail margin of about four to seven cents a litre

Sylvan Lake Hockey Camp hits 45 year milestone

The long-running hockey camp sees kids come from all over the world every year

Sylvan Lake business releases new loose leaf teas

Laurie Breeze and English Rose Tea Rooms have released Mrs. B’s Loose Leaf Teas

Joaquin ‘El Chapo’ Guzman sentenced to life in prison

Experts say he will likely wind up at the federal government’s Supermax prison in Florence, Colorado

Instagram expands Canadian pilot removing ‘like’ counts to more countries

Social media giant plans to roll out the test in Australia, New Zealand, Brazil, Japan, Italy and Ireland

Rents in most Canadian cities are unaffordable for lower-income earners: study

Roughly one-third of households, or 4.7 million, are renters

Natural gas producers demand government action in open letter to Kenney

The letter warns that the viability of the natural gas sector is in jeopardy

Remains of missing Edmonton woman discovered outside of North Battleford: RCMP

The 25-year-old Edmonton woman was reported missing on May 12

Companies to appear before panel today in public inquiry into B.C. gas prices

A three-member panel by B.C. Utilities Commission will listen to up to four days of oral hearings

Interviews with family of highway shooting victim heard in Calgary court

Horst Stewin’s relatives were set to testify by video from Germany this morning, but a court translator said she was unable to proceed

Lower gas prices slow annual inflation rate to Bank of Canada’s 2% bull’s-eye

Prices showed strength in other areas — led by a 17.3 per cent increase in the cost of fresh vegetables

RCMP investigating alleged ‘sexual misconduct’ by cyclist on BCIT campus

BCIT said they were reviewing video evidence of the incident

Most Read