Welcome to Tesla Motors Club
Discuss Tesla's Model S, Model 3, Model X, Model Y, Cybertruck, Roadster and More.
Register

Miles Lost Not Equal to Miles Driven?

JLOC

Member
Jun 10, 2020
77
37
Orange County, CA
I'm a first-time EV owner, so pardon my ignorance regarding this topic.

Yesterday, I left my house with a 90% charge, and my SR Model Y indicated I had 222 miles of range. During that trip, I drove a total of 107.1 miles, at 241 Wh/mi, and 26 kWh consumed, and I ended up back at my house with 89 miles of range left, meaning I drove about 107.1 miles, but lost 133 in range.

I assume this is normal, and that the 222 miles of range is merely an estimate of what I might expect in perfect conditions?

If it matters, the trip was mostly highway driving, and I generally set the cruise control between 72 and 75 mph. In addition, the first half of the drive was uphill, so I saw much higher energy usage, whereas the drive home was on a decline. I had the HVAC set to auto at 72 degrees.
 

DirtyT3sla

Member
Apr 17, 2019
533
558
Holly
I assume this is normal, and that the 222 miles of range is merely an estimate of what I might expect in perfect conditions?

Yup. The same happens in a gas car we just don't normally pay as much attention. If you drive faster/more aggressively you'll use more energy. Temperature, wind, elevation, and other factors also contribute. It is a bit more dramatic in an electric car though.

Conversely, if you were to drive slower, you could go 200 miles while only using, say, 190 miles of range :)
 

srlawren

Member
Aug 3, 2020
449
271
Vancouver, BC, Canada, Eh?
Hi @JLOC you may want to do some more reading here as well as in the general Model Y area as there are tons of threads on range. In short, yes the "222" you're seeing is based solely on your remaining SOC (state of charge--how much % of your usable battery charge remains) times the EPA estimated range number. It does not take into consideration the myriad of factors that affect your range, including but not limited to: ambient temperature, wind conditions, elevation changes on your route, speed factors (aerodynamic drag increases exponentially as your speed increases), your driving style (heavy footed or light footed), and other factors. So, the actual range you can expect is complex but generally expect it to be less than what the EPA number would indicate.

There are alternative ways to get a more accurate estimate or your actual range remaining, such as using the Energy app, or using the navigation to set a destination (and it will show you your estimated % remaining when you arrive), and these take into account at least some of the variables I noted above, but can't possibly predict or handle every factor.
 
  • Informative
Reactions: Rocky_H and JLOC

Pianewman

Member
Oct 28, 2020
730
424
Fort Worth
I think your conclusion is correct. Drop to 65-70mph, you might gain 5-10% of that range back. I think you're consuming more uphill than you're able to recover downhill.

Tire PSI? Ambient temp? (42psi for range, but I've settled on 38psi for comfort...19"s, ContiProContact.
 

JLOC

Member
Jun 10, 2020
77
37
Orange County, CA
Yup. The same happens in a gas car we just don't normally pay as much attention. If you drive faster/more aggressively you'll use more energy. Temperature, wind, elevation, and other factors also contribute. It is a bit more dramatic in an electric car though.

Conversely, if you were to drive slower, you could go 200 miles while only using, say, 190 miles of range :)
Hi @JLOC you may want to do some more reading here as well as in the general Model Y area as there are tons of threads on range. In short, yes the "222" you're seeing is based solely on your remaining SOC (state of charge--how much % of your usable battery charge remains) times the EPA estimated range number. It does not take into consideration the myriad of factors that affect your range, including but not limited to: ambient temperature, wind conditions, elevation changes on your route, speed factors (aerodynamic drag increases exponentially as your speed increases), your driving style (heavy footed or light footed), and other factors. So, the actual range you can expect is complex but generally expect it to be less than what the EPA number would indicate.

There are alternative ways to get a more accurate estimate or your actual range remaining, such as using the Energy app, or using the navigation to set a destination (and it will show you your estimated % remaining when you arrive), and these take into account at least some of the variables I noted above, but can't possibly predict or handle every factor.
I think your conclusion is correct. Drop to 65-70mph, you might gain 5-10% of that range back. I think you're consuming more uphill than you're able to recover downhill.

Tire PSI? Ambient temp? (42psi for range, but I've settled on 38psi for comfort...19"s, ContiProContact.
Thank you all for your input. I clearly do need to do more reading on the topic, as I am obviously quite ignorant on the topic of range.

Again, thank you all for your input!
 

srlawren

Member
Aug 3, 2020
449
271
Vancouver, BC, Canada, Eh?
Thank you all for your input. I clearly do need to do more reading on the topic, as I am obviously quite ignorant on the topic of range.

Again, thank you all for your input!

@JLOC hopefully my reply didn't come across as condescending. What you're going through is a very typical experience for a first-time EV owner, which is why there are so many threads on it here! I should also add that I'm far form an expert, and am still a future Model Y owner at this point. Everything I know about the experience, I have learned from here (and/or watching far too many YouTube videos from Model Y owners and reviewers).
 

JLOC

Member
Jun 10, 2020
77
37
Orange County, CA
Or...use your time doing something constructive, rather than obsessing over your car (the way many of us do!) HAHAHA!
Amen.

I went through this exercise because I have owned my Y for a week, and this was the first time I took it on my long commute (~50 miles each way) to work. We had placed an order for the LR RWD, which still has not been made, but ended up getting a SR after the $2K price drop, even though I was anxious about the range, given my commute.

However, after this test run, I'm glad to see that the SR provides sufficient range for my needs, and I'm glad we didn't pay the extra $ for the LR AWD.
 
  • Like
Reactions: srlawren

JLOC

Member
Jun 10, 2020
77
37
Orange County, CA
@JLOC hopefully my reply didn't come across as condescending. What you're going through is a very typical experience for a first-time EV owner, which is why there are so many threads on it here! I should also add that I'm far form an expert, and am still a future Model Y owner at this point. Everything I know about the experience, I have learned from here (and/or watching far too many YouTube videos from Model Y owners and reviewers).
@srlawren - not at all! I totally got what you meant about the need to read up on this topic further.

Call it laziness on my part, as I was hoping someone could just give me the dumbed-down explanation without going into too much of the technical details of how EV's work (my eyes glaze over once people get too technical on the topic).
 
  • Like
Reactions: srlawren

jcanoe

Active Member
Oct 2, 2020
1,503
1,544
Maryland
Your trip results are as expected. So now you know to expect ~190 miles of range from the SR Model Y. I would not recommend charging beyond 100% on a regular basis but for the occasional longer trip it would be fine. If you want to finesse a few extra miles of range make sure your tires are properly inflated to 42 PSI cold tire pressure reading. I prefer to keep my Model Y with 19" wheels and Continental ProContact RX tires 1 to 2 lbs above the recommended tire pressure. You have a built-in driving reserve if you adjust your highway speed down by 5 or even 10 MPH. The slow lane is fine, gets you to your destination with some additional battery charge you would otherwise not have. Use PlugShare to locate Level 2 charging stations (some are even free to use.) Even 1 hour of Level 2 charging before you start your return trip will add more than 20 miles of additional driving to your Tesla. You could also plan for a short stop at a SuperCharger.

Things that will force you to add charging stops to your trip include elevation changes, colder weather, rain, and head winds. For planning trips use A Better Route Planner.
 
  • Informative
Reactions: srlawren and JLOC

JLOC

Member
Jun 10, 2020
77
37
Orange County, CA
Your trip results are as expected. So now you know to expect ~190 miles of range from the SR Model Y. I would not recommend charging beyond 100% on a regular basis but for the occasional longer trip it would be fine. If you want to finesse a few extra miles of range make sure your tires are properly inflated to 42 PSI cold tire pressure reading. I prefer to keep my Model Y with 19" wheels and Continental ProContact RX tires 1 to 2 lbs above the recommended tire pressure. You have a built-in driving reserve if you adjust your highway speed down by 5 or even 10 MPH. The slow lane is fine, gets you to your destination with some additional battery charge you would otherwise not have. Use PlugShare to locate Level 2 charging stations (some are even free to use.) Even 1 hour of Level 2 charging before you start your return trip will add more than 20 miles of additional driving to your Tesla. You could also plan for a short stop at a SuperCharger.

Things that will force you to add charging stop to your trip include elevation changes, colder weather, rain, and head winds. For planning trips use A Better Route Planner.
Thanks for your input. Still learning a lot about the unique intricacies of being an ev owner.
 

frankvb

Supporting Member
Feb 29, 2020
786
487
San Diego, CA
Thanks for your input. Still learning a lot about the unique intricacies of being an ev owner.
Actually being a Tesla owner - most other EVs don't use the EPA rating but a similar method as ICE when calculating the remaining range. So based on your average mileage over the last N miles.

Of course there are pros and cons to either method, though it would have been nice if Tesla at least allowed you to switch to the other method IMHO (and it already does it in the energy display, so it should be trivial to show that number instead on the top of the main screen).
 

About Us

Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.

Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.


SUPPORT TMC
Top