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Discussion Starter · #1 ·

Is mentioned in this article, but with no specifics. Matt also mentioned it in the CarWow video. My Tesla Model 3 P power does decrease, but it's not really noticeable until SOC drops well below 50%.

Does anyone have any data on this for the M50?
 

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Page 151 of the owners manual says:

The available drive power may be reduced due to the following factors:
  • ▷ Heavily discharged high-voltage battery.
  • ▷ Extreme outside temperatures.
  • ▷ Prolonged or high-power driving, for instance with a sporty driving style or when driving on mountain roads.
  • ▷ Depending on vehicle equipment and na‐ tional-market version: engine power restric‐ tion defined via BMW Digital Key.
    The gray ePOWER area is automatically adjusted.
If needed, icons in the power gauge indicate a reduction of the drive power.
 

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Is mentioned in this article, but with no specifics. Matt also mentioned it in the CarWow video. My Tesla Model 3 P power does decrease, but it's not really noticeable until SOC drops well below 50%.

Does anyone have any data on this for the M50?
in my 330e (hybrid) I get messages of power reduction when its lower than -3°C (for the first 5km)
 

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What drop in range you do notice on average in those conditions?
100% drop in full electric range :p : it means electric power is NOT available for moving the car (but since its a hybrid the car still moves, with reduced power "only" the 180hp petrol engine)

if you mean more in general, how does winter conditions alter (electric) range AFTER its available again: these are my figures (i'm talking only about the full electric part, and knowing I am told to have a sporty drive, and not trying to optimize range or cost (its a company car, a little drift a day keeps me happy))

claimed range in the ad, I believe : 34km
when it was new, in summer without aircon on non highway roads: real : +-28
when it was new, in summer with aircon on non highway roads: real : +-24
when it was new, in freezing winter days with heating on (duh) and car pre heated (coolest feature) non highway roads: real : +-20
when it was new, in freezing winter days with heating on (duh) and car not pre heated (---- I forgot) on non highway roads: real : +-15
after 4,5 years in summer without aircon on non highway roads: real : +-23
after 4,5 years , in summer with aircon on non highway roads: real : +-18
after 4,5 years , in freezing winter days with heating on (duh) and car pre heated (coolest feature) non highway roads: real : +-14
after 4,5 years , in freezing winter days with heating on (duh) and car not pre heated (---- I forgot) on non highway roads: real : +-10

so for me its not so much the winter conditions but more "the aging" that worries me about the continuous range drop.

Edit Mod: Bad language
 

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100% drop in full electric range :p : it means electric power is NOT available for moving the car (but since its a hybrid the car still moves, with reduced power "only" the 180hp petrol engine)

if you mean more in general, how does winter conditions alter (electric) range AFTER its available again: these are my figures (i'm talking only about the full electric part, and knowing I am told to have a sporty drive, and not trying to optimize range or cost (its a company car, a little drift a day keeps me happy))

claimed range in the ad, I believe : 34km
when it was new, in summer without aircon on non highway roads: real : +-28
when it was new, in summer with aircon on non highway roads: real : +-24
when it was new, in freezing winter days with heating on (duh) and car pre heated (coolest feature) non highway roads: real : +-20
when it was new, in freezing winter days with heating on (duh) and car not pre heated (---- I forgot) on non highway roads: real : +-15
after 4,5 years in summer without aircon on non highway roads: real : +-23
after 4,5 years , in summer with aircon on non highway roads: real : +-18
after 4,5 years , in freezing winter days with heating on (duh) and car pre heated (coolest feature) non highway roads: real : +-14
after 4,5 years , in freezing winter days with heating on (duh) and car not pre heated (---- I forgot) on non highway roads: real : +-10

so for me its not so much the winter conditions but more "the aging" that worries me about the continuous range drop.
It might be less an issue with newer / larger batteries. This guy reports a 4.23% degradation of his BMW i3's battery after more than three years and 130k kilometers

Here’s my 3.3 year update owning my EV here in Australia… 134,055KM & counting…

If BMW has not gotten worse I am quite optimistic for the i4.
 

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Discussion Starter · #9 ·
Experience over 2 winters with my current Tesla. It will come as a bit of a surprise that when temperatures drop to around freeing, you can expect around a 20%+ drop in range. I wouldn't see the i4 as being much different in this respect.
 

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Experience over 2 winters with my current Tesla. It will come as a bit of a surprise that when temperatures drop to around freeing, you can expect around a 20%+ drop in range. I wouldn't see the i4 as being much different in this respect.
But I hope range recovered when temperatures got higher again? Also did preheating before departure have any effect? And is the range notably lower under the same conditions after two years?
 

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Discussion Starter · #11 ·
But I hope range recovered when temperatures got higher again? Also did preheating before departure have any effect? And is the range notably lower under the same conditions after two years?
yes, range recovers as temperatures rise. I haven't noticed any change over time.

Preheating helps, but not as much as you might think. It warms the battery, but when you start driving, the cold air tries it's best to cool it down again, plus the heating system has to work harder to maintain cabin temperatures. LiIon batteries don't like the cold :)
 
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