Similar # here now at 24 k miles. Drop off is most initially then evens out. It's not linear.
-
Want to remove ads? Register an account and login to see fewer ads, and become a Supporting Member to remove almost all ads.
Pilot_51
Member
I just threw together a Googly form where people can submit data and it's automatically formatted into a spreadsheet: Tesla range
I'm just trying it out and don't really intend to use it for serious data collection (yet), but I can give anyone else access to edit if they want to turn it into something awesome. I think it would be great if the delivery doc used a form so Alain doesn't need to keep updating it manually.
SeminoleFSU
Voluntaryist
Cool! Thank you for this.. Overall this is a very good first stab at a form for this purpose. I think this will be invaluable. If I may, I'd like to make some suggestions for more consistent data... (sorry it's the DBA architect in me that compels my suggestions)
General: Use dropdowns whenever possible to drive discreet values, and make sure that you're capturing only numeric data whenever possible. text and numeric should never be combined into a single field..
1. Range charge frequency: have a drop down with day, week, month, year and allow the input box to accept numeric only.
2. Typical charge rate: Perhaps have two boxes where one can put # of amps and # of volts separately, so that they are stored in numeric only discreet values.
3. (optional): It might make it way too confusing, but you could add a dropdown for rated/ideal for all the areas you allow those types of inputs. Many have noted the formula for ideal has never changed however rated has changed several times over various firmwares, making it a less consistent data point across firmware versions... although, I'll admit I never look at ideal but would switch temporarily to gather data for a form like this
Pilot_51
Member
Unless I'm missing something, I can't combine dropdown and text input in a single question, but I did what I could to implement your ideas. Thanks!Cool! Thank you for this.. Overall this is a very good first stab at a form for this purpose. I think this will be invaluable. If I may, I'd like to make some suggestions for more consistent data... (sorry it's the DBA architect in me that compels my suggestions)
General: Use dropdowns whenever possible to drive discreet values, and make sure that you're capturing only numeric data whenever possible. text and numeric should never be combined into a single field..
1. Range charge frequency: have a drop down with day, week, month, year and allow the input box to accept numeric only.
2. Typical charge rate: Perhaps have two boxes where one can put # of amps and # of volts separately, so that they are stored in numeric only discreet values.
3. (optional): It might make it way too confusing, but you could add a dropdown for rated/ideal for all the areas you allow those types of inputs. Many have noted the formula for ideal has never changed however rated has changed several times over various firmwares, making it a less consistent data point across firmware versions... although, I'll admit I never look at ideal but would switch temporarily to gather data for a form like this
SeminoleFSU
Voluntaryist
Understood. I haven't played with Google forms much so I didn't know what the options were
Ok so I ran my battery down on my road trip several times to single digit miles and did full range charges. Have had some miles return. 229 on 90% and 255 on 100% with range mode on. Have a pretty good idea of my drivable KWH now. Drove to one mile rated and I had used 72 KWH on the dot. So following the rod and Barbara graph, if accurate, I have lost about 5% in 14 months This is assuming I should have had 75.9 KWH total at new available for range charge. The zero mile being 5.1 KWH, if accurate , still chaffs me as I would love access to that. Seems crazy to have that much buffer. Anyway, will continue to charge 90% and see. Not happy about 5% lost but I'm hoping this is the "big drop" others have assumed would happen in early life. If the next year brings a similar drop, I'm going to have to be that annoying customer to Tesla and demand some answers as this is not an acceptable rate of decline for long term use.
I maintain this a my single most, and really only annoyance with the company thus far. The guidance about how use, charge, maintain and monitor the battery is completely absent. I hate that it is regarding such a vital component.
For now, I'm going to follow my total KWH and ditch the rated number. Wish this was provided by Tesla but since is not, may need to run the car down low occasionally to see where it is.
I maintain this a my single most, and really only annoyance with the company thus far. The guidance about how use, charge, maintain and monitor the battery is completely absent. I hate that it is regarding such a vital component.
For now, I'm going to follow my total KWH and ditch the rated number. Wish this was provided by Tesla but since is not, may need to run the car down low occasionally to see where it is.
Bardlebee
Member
If I maintained a google doc with maybe a help of a few others on the board, do you think I should make a separate thread about it? To start from scratch?
But it's not "completely absent".
From the manual:
and:
It's simple, really.
Now we here might be interested in more detail, explanations of balancing mechanisms, discussion of range estimation algorithms, etc... but I suspect we are a significant minority of the general car-owning population. If anything, the pains folks will go through here to try to second guess the algorithms, force battery balancing, etc... just indicate the level of "interest" in the matter that would make the eyes of the average Joe just glaze over.
Thus, even though we might like a nice whitepaper discussing all the BMS nuances, it's not really accurate to say guidance about how to use and charge the battery is absent. It is present and at the appropriate level for the majority if the car buying population.
Last edited:
Since you didn't drive the car past zero, and are relying solely on the range estimate. There very well could have been another 3-4 kWh of energy that the algorithm was not accounting for and that could have been utilized past zero. Once you did that, the algorithm would have probably added those miles back into the range estimate at your next charge.
Yes. And pm with mods to try to make sticky. And lobby with a bunch of prolific contributors to urge them to participate--others will follow. Also make sure there's an easy way to add updated range info, as you'll want many data points per car over time to understand correlations. Talk to jeff miller who did this for lifetime wh/mi data collection and analysis. Pm me if this doesn't make sense.
My car got as low as 218 at ~9300 miles at 90% but with 90% charges has moved up to 223. Still not good but better than 218 I guess.
- - - Updated - - -
The drop off in some cases does not even off. Sometimes it accelerates. 265 range new to 258 range in 1/2014 to to 250 after replacement to 240 range now. That is not leveling off.
wish those with reconditioned replacements would compare notes. Maybe it's my imagination but reconditioned packs seem to have dropoff. Confess too lazy to reread this thread and find the data
These are my exact numbers as well. For the last few months 218 was my maximum charge at 90%. Lately I have been charging ONLY to 90% and it has crept up to 223 but seems to have leveled out there. My last range charge was one week ago and I got 247 - with normal mileage drop as soon as I started driving.
Last edited:
Just doing the math here, at 100% you're at 240, at 90% you're now at 223 (which is 92.4%). Doesn't quite align and I don't know why. I'm asking because I'm also at 222-223 on a 90% charge and hit 248 on a range charge. That's with 25k on an original 'A' pack delivered in Apr 2013.
interesting that per Model S REST API - Page 108 after v6.0 the cars may be charging slightly over the preset now. aka 90% preset but cars are charging to 91%. what 'small increases' we we may be seeing on rated range after v6 may not be less degredation but in fact the car's may just be charging to a slightly higher SOC.
I'm at 224 with 90% at 28,000 miles
. I range charge almost never. Just a handful of times a year, mostly during the summer.Similar threads
- Question