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MASTER THREAD: Range Loss Over Time, What Can Be Expected, Efficiency, How to Maintain Battery Health

KenC

Active Member
Sep 4, 2018
3,618
3,287
Maine
My 2018 LR RWD (310 miles new, 325 mile update) had been rock solid at 313 miles up until this past October and has trended to about 300 miles over the past two months. Today I woke up to the reported 100% charge being 253 miles.

Is this a case of the app displaying expected range based on the past consumption, miscalibration, or sudden capacity loss?

From my experience, the number on the app has always been rated range, not projected range. If it's simply displaying projected range then I have no issues other than wishing that it would state "projected range at current temperatures".

Yes, I realize that my battery is cold, but the range number has never cared about that before.
swfIupa.jpg
The range number reps the green section. It’s not counting the blue. Mine has knocked as much as 30 miles off my range estimate.
 

TheRFMan

Member
Dec 15, 2019
552
420
Ottawa, Canada
unplug the charger and plug it back up to fix the 20 hour thing.

The time estimate is probably accurate. The car is charging at 16A/234V (3.7 kW - I assume a NEMA 6-20 outlet), and judging by the blue bar it's pretty cold, which would take some of that power for the battery heater, further increasing charge time.
 
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CWFLY

Member
May 9, 2018
65
55
San Diego
My 2020 M3 full-charge is 303 miles indicated after charging 100% (65ºF).
I have only 4,000 miles on the car. First time I've only charged it 100% once since I bought it.
That's a 10% loss compared to the claim. Additionally, I noticed that the my new M3 gets worse mileage than the old M3.

Note: My 2018 M3 full-charge was 318 miles indicated after charging 100%. That car was 2yrs old and had 18K miles. Additionally, I noticed that the my new M3 gets worse mileage than the old M3.

Why is the new car so much worse than the old car? Is this perhaps a battery problem? Thoughts?
 

Don B.

Member
Apr 4, 2016
18
2
Sacramento
Current Stats:

Oct 2018 Model 3 AWD LR
51,000 miles
Full Charge limit is 281 vs 310
Everyday is set to 90% with mostly home charger.

You're doing better than me. Mine has been dropping quickly over the last month. I was getting 225-235 miles at 80% a month ago. I made an appointment to have the service look at it.
Oct 2018 Model 3 AWD LR
40,000 miles
The full Charge limit is 260
80% charge gets me 208 miles
Charge to 80% almost every day, rarely use supercharging.
 

ratsbew

Active Member
Mar 3, 2012
1,286
953
O'Fallon, IL
Update for me...100% returned to 302 miles after charging. It seems like it takes temperature into consideration and it isn't just a rated range display.
 

snord

Member
Jul 20, 2020
58
13
Louisiana
I'm at 3500 miles. Just installed and ran ScanMyTesla for the 1st time. I know from the graphs that there is an initial fall in battery degradation before it stabilizes... at what miles does that fall take place and whats a reasonable range for that fall?
 

Kianaf808

Member
Jul 1, 2020
22
2
Honolulu
Aloha All,
I have a 2021 Model 3; it's not a car, it's a spaceship! Anyway, I know this is a the most common concern, but after watching YouTube and trying to research the topic myself, I've come up with the following charging method:
PLUG IN EVERY DAY NO MATTER WHAT.

I live in a condo and have no home charging. Oahu has very few higher powered chargers that cost a FORTUNE to charge (starts at 49 cents a KWH). Luckily there are a few free chargers at Ala Moana Mall where I charge my car.
Sooooo, if I drive only a few miles a day can I charge every other day from 75-80% up to 90%?
Advance Thanks to all!
 

jjrandorin

Moderator, Model 3, Tesla Energy Forums
Nov 28, 2018
9,567
10,781
Riverside Co. CA
Aloha All,
I have a 2021 Model 3; it's not a car, it's a spaceship! Anyway, I know this is a the most common concern, but after watching YouTube and trying to research the topic myself, I've come up with the following charging method:
PLUG IN EVERY DAY NO MATTER WHAT.

I live in a condo and have no home charging. Oahu has very few higher powered chargers that cost a FORTUNE to charge (starts at 49 cents a KWH). Luckily there are a few free chargers at Ala Moana Mall where I charge my car.
Sooooo, if I drive only a few miles a day can I charge every other day from 75-80% up to 90%?
Advance Thanks to all!


(moderator note: moved to master thread which discusses battery health)

===================================

To answer your question, yes, you can if thats what you prefer to do.
 
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jjrandorin

Moderator, Model 3, Tesla Energy Forums
Nov 28, 2018
9,567
10,781
Riverside Co. CA
Thank you!!

Your welcome. To prevent you from feeling like you need to (or should) read this entire thread, in general:

1. The recommendation to plug in all the time is one more of convenience from tesla's end. Its also to prevent people from "forgetting" to plug in, and not understanding that their car will lose range just sitting there, even if they dont drive it.

2. As long as you understand the above (that the car will lose range sitting there when you dont drive it), and keep enough range in your car for things you want to or need to do, you can charge it however is convenient for you, between the battery percentages of about 50% to about 90%.

3. Avoid charging to 100% frequently, only do so when you will be driving soon, and think you need the range (unlikely on the island I would think)

4. Avoid leaving the car at low states of charge for a long time (10-15%).

thats pretty much it. The rest (and there is a LOT of "the rest") is people digging into details because they either enjoy it, or are paranoid about it.
 

ehacke

Member
Sep 29, 2020
149
105
Toronto, Ontario
I probably only drive about once a week at this point, and probably only to the grocery store or similar. Maybe less.

Thinking only in terms of what's best for the battery, should I leave it charging continuously, set a scheduled charge and allow it to fluctuate a bit, or does it even matter?

I don't care about off peak charging, and I'm only charging on 120v to 70%. Sentinel is on.
 

jjrandorin

Moderator, Model 3, Tesla Energy Forums
Nov 28, 2018
9,567
10,781
Riverside Co. CA
I probably only drive about once a week at this point, and probably only to the grocery store or similar. Maybe less.

Thinking only in terms of what's best for the battery, should I leave it charging continuously, set a scheduled charge and allow it to fluctuate a bit, or does it even matter?

I don't care about off peak charging, and I'm only charging on 120v to 70%. Sentinel is on.

(moderator note: moved to battery master thread)

==============================

To answer your question, it doesnt really matter. Set it to whatever percentage you want (in your case 70%) and let it top off as needed. Since you are using sentry mode, it will need to charge some every day anyway, and it doesnt matter much whether its every day, every couple of days etc.
 
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Swordtail

Member
Oct 23, 2020
23
7
UK
Hi. So the trip readings don't include preheating etc, but if I'm driving with the heater or AC on, does the reported consumption include that or is it just the energy used to turn the wheels?
 

Ekim7878

Member
Nov 16, 2020
10
13
Atlanta
Picked up my 2021 m3p 2 weeks ago. Been charging to about 80% or 250 miles. I drive 26 miles on my commute one way and am using 45 miles of battery range.

Conditions: in chill mode not sport, 90% highway driving at 80mph. 48 degrees F outside.

Is it normal to lose this much charge?
 

derotam

Member
Oct 31, 2018
825
702
Oak Hill, VA
Picked up my 2021 m3p 2 weeks ago. Been charging to about 80% or 250 miles. I drive 26 miles on my commute one way and am using 45 miles of battery range.

Conditions: in chill mode not sport, 90% highway driving at 80mph. 48 degrees F outside.

Is it normal to lose this much charge?

Very easy to see that when doing short trips in cooler temperatures. Longer trips are more efficient in the cold than many short trips in the cold.

Also, speed becomes a major factor the faster you go.
 

glide

Active Member
Jun 6, 2018
3,311
3,450
USA
Picked up my 2021 m3p 2 weeks ago. Been charging to about 80% or 250 miles. I drive 26 miles on my commute one way and am using 45 miles of battery range.

Conditions: in chill mode not sport, 90% highway driving at 80mph. 48 degrees F outside.

Is it normal to lose this much charge?
80 mph and 48 degrees are the primary culprits.
 
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jjrandorin

Moderator, Model 3, Tesla Energy Forums
Nov 28, 2018
9,567
10,781
Riverside Co. CA
Picked up my 2021 m3p 2 weeks ago. Been charging to about 80% or 250 miles. I drive 26 miles on my commute one way and am using 45 miles of battery range.

Conditions: in chill mode not sport, 90% highway DRIVING AT 80. 48 degrees F outside.

Is it normal to lose this much charge?

As mentioned, yes perfectly normal at the speed I bolded in your quote above.
 
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