Surprise-surprise

[ny_quant]

A new AAA study finds that when the thermometer dropped to 20 degrees Fahrenheit, range fell by an average of 41 percent on the five models it tested… Some EV drivers recently found that range can drop by half when the mercury tumbles into negative territory.

https://www.cnbc.com/2019/02/06/aaa-confirms-what-tesla-bmw-nissan-ev-owners-suspected-of-cold-weather.html

Comments

[misha-b.livejournal.com]

I don't think insulation is relevant here. This power is only needed for heating the car interior initially for a few minutes. The heat loss during that time is negligible.