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

Rutland community rallies against McCurdy house

Nearly 100 neighbours protested Kelowna’s newest ‘wet’ supportive housing project

A four-storey supportive housing development on Agassiz Road was approved by council

Kelowna council voted “yes”, but not without consideration

“It’ll happen again”: Lake Country council has no answers for flood victims

Flood victim snuffed when she asked about future provisions to stop water main breaks from occuring

Plane crashes in Okanagan Lake

RCMP say wheels left down caused landing plane to overturn on lake

Okanagan-Shuswap weather: mix of sun and clouds

Environment Canada is calling for a chance of rain and risk of thunderstorms across the Okanagan tonight

Astronaut David Saint-Jacques returns to Earth, sets Canadian space record

Native of Saint-Lambert, Que., set a record for longest single spaceflight by a Canadian at 204 days

Holi: Festival of Colours celebrated in the South Okanagan

Kismet Estate Winery, in Oliver, celebrated Holi with their guests last weekend

The world’s Indigenous speakers gather in B.C.’s capital to revitalize languages

Organizers estimate about 1,000 delegates from 20 countries will be at the conference

Join talks on international treaty: B.C. First Nations mark ‘historic moment’

Representatives of the Ktunaxa, Syilx/Okanagan and Secwepemc Nations participated

Companies need clearer rules on workplace relationships, study suggests

One-third of Canadians have been in love at work, and half say no policy on the matter exists

B.C. premier says Greyhound replacement news could come shortly

Province is working with the private sector to find a solution, says premier

Okanagan bylaw officer best in B.C.

Al Harrison of Vernon named Bylaw Officer of the Year at annual association conference

Man accused of assault at South Okanagan beach gets bail

Thomas Brayden Kruger-Allen was granted bail at the Penticton provincial courthouse on Monday

‘Text neck’ causing bone spurs to grow from millennials’ skulls, researchers say

Technology use from early childhood causing abnormal bone growths in 41 per cent of young adults

Most Read