This is a ridiculous way to judge whether an electric car is "real world ready" I've been driving cars for 23 years of my life and I've never found myself in an extreme situation like this. Yes, it could theoretically happen, but to write of a new technology just because of fear of this specific, rare event is silly.Uniballer wrote: ↑Mon Aug 24, 2020 1:12 pm My concern about an electric vehicle is different.
In November 2000 I was trapped on a major limited access highway during a surprise afternoon snow storm, less than 20 miles from my home in Western New York. A tractor-trailer had jack-knifed ahead of me and closed the road until it could be removed. By the time the truck was removed there was about 2 feet of snow on the road. There were hundreds (thousands?) of other people in the same boat. We got rolling at around 11AM the next morning.
I had 1/4 tank of gas when I left home. I ran the engine for about 15 minutes every hour to stay warm. I still had enough gas to make it off the highway and find a gas station. Will an electric vehicle in this circumstance be able to keep the passengers warm all night, and still have usable range? If not, then I would say that they are not real-world ready.
BUT, the answer to your question can be calculated if you know the state of the battery/how many KWH the battery has left and how many kw your heating system uses when running. My BMW i3 uses a heat pump for heating the car, which is very efficient. Same with the new Tesla Model Y. If only using it to keep the car above freezing temps and with 25% charge, I'm confident it could easily accomplish what you describe if necessary. In fact, I'm sure someone smarter than me could calculate exactly how many hours the car could run the heater as you describe. And it would be a more precise calculation than possible with an ICE.