AAA Study: Extreme Cold Has Chilling Impact on EV Assortment


When it comes to all-electric autos, the major supply of apprehension for most would-be buyers is assortment, and logically so. Following all, once your EV’;s battery runs out of juice, unless of course you take place to be pulling into a charging station at that quite minute, that’;s as far as you’;re going — at least till the tow truck demonstrates up. Even though very good arranging can avoid that situation, EV drivers have to also account for the often-dramatic swings in assortment brought on by varying weather problems, particularly excessive cold.

A Winter in the Nissan Leaf

A new examine launched this month by AAA discovered that EV assortment can be decreased by as a lot as 57 percent primarily based on the outdoors temperature. At the AAA Automotive Study Center in Southern California, researchers carried out a simulation to measure the driving range of 3 all-electric cars in cold, moderate and hot weather, and temperature played a main part in driving assortment for all 3.

In accordance to AAA, the typical EV battery variety was 105 miles at 75 degrees, but dropped to 43 miles when the temperature was diminished to twenty degrees. By comparison, 95-degree temperatures decreased battery existence considerably significantly less to 69 miles, a 34 percent dip. Tests had been carried out among December 2013 and January 2014, with each car finishing a driving cycle beginning with a total charge beneath all 3 temperature conditions until their batteries were completely depleted, following standard procedures of the EPA and the Department of Energy.

The bottom line, in accordance to AAA, is that customers of EVs need to be conscious of their limitations as well as their strengths, in varying situations. “EVs provide owners with a lot of benefits, but every motorist requirements to be aware of situations that can effect automobile driving variety,” AAA said in a statement. “EV drivers need to have to prepare very carefully in hot and cold weather.”

The news comes as no shock to us at Vehicles.com, as we invested the winter of 2011 observing climate-induced range swings in our prolonged-phrase Nissan Leaf test automobile, variations we described at the time as “erratic.” With the auto fully charged, estimated selection was typically among 70 and 80 miles, in line with the EPA’;s 73-mile amount but properly beneath Nissan’;s “up to” figure of 25 miles. Outside temperatures ranged from the mid-20s to mid-40s for most recorded journeys. The longest predicted assortment and greatest-observed final result the 2 came at greater temperatures than the shortest range and worst-observed outcome. We recorded temperature, predicted miles, real miles, publish-trip readouts of miles per kilowatt-hour and typical speed, as effectively as our own accounting of visitors problems, and no distance, situation or reading correlated consistently with the variety.

“The unpredictable variety means the Leaf is not for somebody whose commuting wants are closer to the car’;s limits than ours are,” we explained at the time. “And it truly is certainly not a likely choice if you can own only 1 automobile.”

Automobiles.com photo by Evan Sears

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