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

Lacombe County Council contributes to new Eckville playground

The Eckville Fundraising Society is receiving $50,000 from the County to put towards the playground

Eckville Slo Pitch asks Council for additional diamonds

The league is looking to expand and can’t do so with its current two diamond, one night arrangement

Eckville Jamboree ready to dance in to town

The annual three-day event, Aug. 23-25, will be held at the Eckville Community Centre

Over 1,000 barrel racers pouring into Ponoka next week for ABRA Finals

The Alberta Barrel Racing Association Finals will be held at the Calnash Ag Event Centre Aug. 19-25

VIDEO: Could we BE any more excited? ‘Friends’ fans go crazy for merch

Movie theatres will show select episodes to mark the NBC series’ 25th anniversary

Alberta oil curtailment rules extended to late 2020 as pipeline delays drag on

At issue is ability to export oil in face of regulatory and legal challenges against pipelines

Nearly 50% of Canadians experience ‘post-vacation blues’: poll

48 per cent of travellers are already stressed about ‘normal life’ while still on their trip

More women may need breast cancer gene test, U.S. guidelines say

Recommendations aimed at women who’ve been treated for BRCA-related cancers and are now cancer-free

Scheer promises EI tax credit for new parents if Conservatives form government

The government currently taxes employment insurance benefits for new parents

Panel to review impacts of safe injection sites in Alberta

It will look at crime rates, social order and property values, and not harm reduction or housing

Five suspects arrested by Leduc RCMP with help of Wetaskiwin and Maskwacis

Leduc RCMP work with Maskwacis and Wetaskiwin RCMP to make arrests

Elections Canada to assess ‘partisan’ climate change rhetoric case by case

People’s Party of Canada Leader Maxime Bernier has said climate change is not an emergency nor caused by human

Most Read