What is a reasonable winter range expectation for my new Touring?

[Pragmatic]

Heated seats and steering wheel have negligible impact on range. A heated seat is 40w times 2 plus 20w for the wheel. Driving for 3 hours would use 0.3 kw-hr or 1 mile of range.
Cabin heat on the other hand greatly impact range. The cabin heater is of the order of 4kw. After 3 hours of driving it would use 12kw-hr of power or 42 miles.
So driving at 75mph for 3 hours you would use 62.5 kw-hrs to move the car, 12 kw-hr to heat the car and .3 kw-hr for the heated seats and wheel. Or 225 miles using ~75 kw-hrs or 81% of a Touring battery or 67% of a GT battery.

 

[BS8899]

Heated seats and steering wheel have negligible impact on range. A heated seat is 40w times 2 plus 20w for the wheel. Driving for 3 hours would use 0.3 kw-hr or 1 mile of range.
Cabin heat on the other hand greatly impact range. The cabin heater is of the order of 4kw. After 3 hours of driving it would use 12kw-hr of power or 42 miles.
So driving at 75mph for 3 hours you would use 62.5 kw-hrs to move the car, 12 kw-hr to heat the car and .3 kw-hr for the heated seats and wheel. Or 225 miles using ~75 kw-hrs or 81% of a Touring battery or 67% of a GT battery.

What ambient temp are you assuming?

Does you calculation comprehend the lower efficacy of the batteries at lower temperature?

 

[BS8899]

What ambient temp are you assuming?

Does you calculation comprehend the lower efficacy of the batteries at lower temperature?

Here is an article on temperature and its effect on charging time and EV mileage.

The Impact of Temperature on Lithium-Ion Battery Efficiency in EVs

Explore our deep-dive into the "Temperature Impact on Battery Efficiency," specifically for lithium-ion batteries in EVs. Understand, adapt, maximize efficiency!

ioncoretechnology.com

If you combine all the factors we talked about (cabin heating, speed, ambient temp, elevation, wind, etc.), it is conceivable that your realizable range is 50% or less of your fair-weather range. On top of that, you have to discount the EPA-range claim vs the actual achievable range. Don't forget that, as practical matter, your en route charges would probably be more like 10%-80% SoC rather than 100% SoC (takes too long).

So, your realizable range under winter conditions at highway speed can easily be 1/2 of the fair weather range. It could be even worse!

 

[Adnillien]

Does you calculation comprehend the lower efficacy of the batteries at lower temperature?

Temperature has very little effect on battery efficiency. Cold temperatures do reduce the battery voltage, reduce available capacity and do limit the power in or out of the battery.

 

[BS8899]

Temperature has very little effect on battery efficiency. Cold temperatures do reduce the battery voltage, reduce available capacity and do limit the power in or out of the battery.

Thanks for the elucidation. Nevertheless, in cold weather, the net effect is a reduction is a reduction in the battery's ability to provide energy thus, reducing the achievable range. Is that the correct interpretation?

 

[Pragmatic]

I'm not assuming an ambient. I'm trying g to show that it is all cabin heat and seat and steering wheel heaters do not matter.

 

[Adnillien]

Thanks for the elucidation. Nevertheless, in cold weather, the net effect is a reduction is a reduction in the battery's ability to provide energy thus, reducing the achievable range. Is that the correct interpretation?

That is correct

 

[BS8899]

That is correct

Thanks....

Colder climates can be brutal on EVs. Nowadays, I live in AZ/CA. I grew up in much colder climate (Canada). In the dead of winter (say late Jan/early Feb), it can be -20 to -40. At -40, degree F and degree C are the same .

 

[Golfervet]

My wife and I make an annual snowbird road trip from Wisconsin to Arizona in December, so there are several factors that would affect the range of our AT: 30 - 35 degree temps when we begin our trip, 600 lbs of combined baggage and passenger weight, operating the heater, and averaging 75 - 80 mph much of the time. The EPA estimates 411 miles with 19" wheels. What do you think would be a safe range assumption between charges if I charge to 80% each time under these conditions?

I would count on 200 miles to be safe

 

[PaulC]

Driving a 2025 GT loaner: today on 21" tires (44psi) in 45 degree weather on highway/intown. Battery is at 0.31, high regen, x 112 x 2.72 mi/kwh =94.4 mile range, but miles remaining on arrival in navigation is 144, so don't depend on miles remaining on arrival based on Nav system? Total miles driven at time =160.

 

[Lucken]

Heated seats and steering wheel have negligible impact on range. A heated seat is 40w times 2 plus 20w for the wheel. Driving for 3 hours would use 0.3 kw-hr or 1 mile of range.
Cabin heat on the other hand greatly impact range. The cabin heater is of the order of 4kw. After 3 hours of driving it would use 12kw-hr of power or 42 miles.
So driving at 75mph for 3 hours you would use 62.5 kw-hrs to move the car, 12 kw-hr to heat the car and .3 kw-hr for the heated seats and wheel. Or 225 miles using ~75 kw-hrs or 81% of a Touring battery or 67% of a GT battery.

That’s it, moving to Florida.