EV Range Can Be Westher-Reduced by an Average of 57%, AAA Finds
With Dyno Tests on Nissan Leaf, Mitsubishi iMiEV and Ford Focus EV
Electric vehicle range can be reduced by an average of 57% based on the temperature outside, says AAA, basing its findings on dynamometer research conduced at the AAA Automotive Research Center in Southern California. updated March 28
“Electric motors provide smooth operation, strong acceleration, require less maintenance than internal combustion engines, and for many motorists offer a cost effective option,” AAA engineering and repair managing director John Nielsen says in a release.
The weather can make a significant difference, and not just cold weather.
“However,” he said, “EV drivers need to carefully monitor driving range in hot and cold weather.”
AAA conducted a simulation to measure the driving range of Nissan Leaf, Mitsubishi iMiEV and Ford Focus EV vehicles in cold, moderate and hot weather. “Temperature made a big difference in driving range for all three EVs,” the organization found.
Heat Hurts Too
Vehicles were tested for city driving to mimic stop-and-go traffic, and to better compare with EPA ratings listed on the window sticker, AAA says. The average EV battery range in AAA’s test was 105 miles at 75°F, but dropped 57% to 43 miles when the temperature was held steady at 20°F. Warm temperatures were less stressful on battery range, but still delivered a lower average of 69 miles per full charge at 95°F.
The AAA testing was conducted between December 2013 and January 2014. “Each vehicle completed a driving cycle for moderate, hot and cold climates following standard EPA-DoE test procedures,” AAA says – they were fully charged and then “driven” on a dynamometer in a climate-controlled room until the battery was fully exhausted.
AAA notes that it has initiated several projects to support members who drive EVs, including mobile recharging units and EV charging stations.
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Source: AAA with Fleets & Fuels follow-up