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

May the fourth be with you for Vernon Comic Con

Second annual event expected to draw hundreds of characters

Vernon school bus driver fondly remembered

Mike Moore, 56, was Vernon School District employee for 25 years before succumbing to cancer

Vernon caps downtown cannabis retail applications at six

Four currently approved, two more coming, moratorium in place, reviewed after 12 months

One day cat cafe comes to Lake Country

The Lake Country Art Gallery will host the adoption event

North Okanagan men flee police, crash into barrier

Police in Kamloops attempted to pull over a vehicle driving erratically

VIDEO: Are you concerned about Facebook leaking personal information?

Local Okanagan Facebook users speak on the social platform’s privacy settings

Memorial bench for young South Okanagan woman who died was stolen

Someone stole the stone bench that was placed at a walking bridge across the creek

VIDEO: B.C.’s waving granny gets incredible send-off from school kids

Tinney Davidson has been waving at students on their way to school for over 11 years, but is moving in a month

Struggling B.C. adoption agency elects new board that intends to keep it open

The previous board announced that Choices would close May 31

Vancouver man, 19, charged in human trafficking case involving teen girl

The 16-year-old girl was reported missing and later discovered in Vancouver

VIDEO: Large dust devil swirls through downtown Chase

Residents look on as column climbs about 90 feet into the air

Helevorn comes to Kelowna on first Canadian tour

The Spaniards will bring their brand of doom metal to Kelowna May 11

Summerland auxiliary raised $1M for hospital tower

Funds came from sales at Summerland Health Care Auxiliary Thrift Shop

Most Read