Winter Weather Performance

[LightningShow]

Actual loss on trip last week was more like 50%.

Apparently, I'm a much more conservative driver than you.

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[EaglesPDX]

I just noticed that those numbers are just estimated range based on what the vehicle's display tells the driver, not any kind of actual range testing.

There are two numbers you see on a Tesla. The Estimated Range which is just kWh in battery x 4.10. There is also Projected Range which shows based on driving from last 5,15,39 minutes and in average or instant. That's the number you have to watch when Winter driving.

 

[EaglesPDX]

Apparently, I'm a much more conservative driver than you.

Typically five over speed limit until 75mph then speed limit.

It's the passing that gets me over 100 but not on freeways and this was 800 miles straight on I84.

 

[LightningShow]

Typically five over speed limit until 75mph then speed limit.

It's the passing that gets me over 100 but not on freeways and this was 800 miles straight on I84.

is that 40% less than EPA range? I've never seen more than 20% range loss when I haven't really jacked up the heat. Even when I haven't been able to pre-condition the car it's still under 25%. Maybe the efficiency meter is off, I haven't done any controlled charging sessions to see if it matches up with the readout.

 

[EaglesPDX]

is that 40% less than EPA range?

Yes.

 

[LightningShow]

Here's an actual cold weather range test, done in Norway, where they ran the cars all the way down in real driving conditions. Good data here. The Model 3 was near the top in range loss at 28%. The Bolt (Opel Ampera-e in Europe) was actually the worst at 30%. They tested 20 cars, they ranged from 10% to 30% less than their stated range.

https://insideevs.com/news/404632/winter-range-test-best-evs-cold-weather/

EDIT: At some point mfgs are going to need to start publishing cold weather range. Kind of surprised that hasn't been forced on them yet.

 

[playjack]

You're also making an assumption that the range is affected solely by the temperature of the battery pack itself. In fact, the GOM (guess-o-meter) looks at WEATHER to determine range.

The real range, not dissimilar to the DTE gauge on an ICE vehicle, is the miles per kWh (gallon on ICE) that you actually are getting when you use the vehicle. So, if you pre-condition via a departure time with the vehicle plugged in, the battery gets warmed up. The fact that it's cold out will impact it once you start driving, because the battery isn't going to stay warm.

As @sotek2345 stated, the real measurement that you use is the % of battery left, times the size of the battery, times the miles per kWh. As you drive, it's pretty easy to do that. If I have 50% left of a 131kWh battery, and I'm getting 1.5 miles per kWh, then I expect to get 98 miles of range before I'm empty. Since I never want to be empty, I can go 80 miles with a buffer.

A little bit of both. If you start with 180 miles of range and use 100 of that, that is 55 percent. If the temperature then get back to say 70 degrees (note, not just the truck, the ambient temp) you would have 45 percent battery remaining or 135 miles.

Note, this would be a very unusual weather pattern.

A little bit of both. If you start with 180 miles of range and use 100 of that, that is 55 percent. If the temperature then get back to say 70 degrees (note, not just the truck, the ambient temp) you would have 45 percent battery remaining or 135 miles.

Note, this would be a very unusual weather pattern.

Thanks Soteck2345 and ricklightning for answering. Question is rather hypothetical in nature.

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