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2021 model Y scan my Tesla battery size
- Thread starter coconutboy84
- Start date
scottf200
Well-Known Member
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Justicepool
Member
I read that thread. I'm pretty sure I saw a Model Y with a mfr date of 2/9 with the old headlights yesterday. I pick mine up today (pickup time moved from 10:30 am to 5:00 pm...GRRRRRR).
Mine was supposed to be built on 2/15 so we shall see.
SucreTease
Teslarian
It isn't "Reddit" that says it. It is someone on Reddit who says that someone at a Tesla showroom said it. And what was said contains known false information (i.e. "all Model Y vehicles manufactured after Feb 7th have the new intelligent headlight"). Anyone who has been around Tesla for a while knows to take anything said by a Tesla employee with a grain of salt. To date, only Performance models have been confirmed (via photos) to have received the new headlights.
Justicepool
Member
Here at the store now. Haven’t seen my Model Y yet.
However, I was wrong about the 2/9 build having the older headlights. It is a 121k vin and a Performance Model Y and it does have the new headlights.
scottf200
Well-Known Member
I thought this was an interesting/oddly worded update to TeslaFI . COM. Would that imply that is how the Tesla API differentiates between them ... or just the only way you can get this 'insight' with the current API details.
Venom
Member
My MYP was built 02/27 and my SA checked the spec sheet which said the battery was the 74kwh battery pack.
Venom
Member
That’s understandable but the SA just read off the vehicle’s spec sheet. Kinda difficult to mess that one up right?
Id love it to be the bigger battery though. How could I test it?
AlanSubie4Life
Efficiency Obsessed Member
Just refer to the methods posted here about how to determine your capacity (which I think you have already seen). A 2021 Model Y Performance has a ~81kWh capacity. 95.5% of which is available above 0%.
You don’t have to test it or rely on anyone else - the energy screen tells you everything you need to know about your pack capacity at any point in time, assuming high SoC.
You don’t have to test it or rely on anyone else - the energy screen tells you everything you need to know about your pack capacity at any point in time, assuming high SoC.
AlanSubie4Life
Efficiency Obsessed Member
They aren’t really “estimates” on the screen (except that the BMS value itself is an estimate, which applies equally to SMT). They have been correlated with SMT output and it matches. There is no ambiguity here. Tesla does things a certain way, and unless they change it, the Energy Screen shows all, within about 1kWh (only two sig figs) assuming a high SoC.
Battery capacity in Wh = Projected Range * Recent Avg Efficiency / SoC %
Projected range is the projected range, not the number next to the battery.
No need to worry. This works. It is very reassuring, I hope. Been verified many many times over at this point with SMT.
The non-P Y for 2021 so far has been 77.8kWh nominal full pack when new, AFAIK. But I could be wrong about that - and it varies a bit from vehicle to vehicle, and eventually (probably) Tesla will start delivering Ys with “82” kWh FPWN values in non-P trim (no idea when!), so best just to check your own vehicle. No need for SMT for this purpose (obviously SMT gives lots of other useful info though).
Would be great to get the link to the Reddit thread with the evidence of a larger pack from either SMT or the Energy Screen. Never mind I see the link. Seems like exactly zero evidence. There is no need to guess here. Just takes one picture.
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ratsbew
Active Member
I ordered a LR Y on Friday the 5th. I'd love to have the bigger pack...should be an extra 15-20 real highway miles. I'm planning on delaying delivery until May 1st.
With the 20" wheels that we selected it should make it about equal to the highway rang of the 19".
With the 20" wheels that we selected it should make it about equal to the highway rang of the 19".
AlanSubie4Life
Efficiency Obsessed Member
Yep that would be well worth the wait.
Hopefully some brand-new owner here posts their energy screen picture with the three numbers and then there would be no mystery! No need to wait for SMT.
One of the related threads below (the last one) outlines the basic method with a picture FWIW.
ratsbew
Active Member
I'm delaying specifically for the updated headlights, but honestly the pack is worth waiting for more. I'd guess they are in the process of upgrading the battery lines one by one. You'd think they would put the old cells in the Model 3 since it is more efficient.
Venom
Member
Venom
Member
I see, I’ll have to look through the thread again since I don’t know how to measure it. I wonder why my SA said the spec sheet is showing 74kw battery.
AlanSubie4Life
Efficiency Obsessed Member
The new related threads feature is awesome.
Here is the link to the post in this thread though:
2021 model Y scan my Tesla battery size
Thank you posting this info. Now I have the data to help me move forward with the order.
teslamotorsclub.com
The new quote feature, however, not so good - I have no idea where it is getting that text from. It’s from a post somewhere on this thread, just not that one!
Additional caveat on this method is that of course capacity lockouts can be hidden by Tesla when using this method. SMT might show such a lockout by showing FPWN value higher than Nominal Full Pack. There are several other scenarios as well. But as far as utility goes, the method is great - it tells you how much available energy your BMS thinks you have (with a full pack) before vehicle shut down.
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Venom
Member
Awesome! I love the new thread share feature. Does Tesla throttle the battery? So they make it behave like a 75kw battery even though it’s the 82kw?The new related threads feature is awesome.
Here is the link to the post in this thread though:
2021 model Y scan my Tesla battery size
Thank you posting this info. Now I have the data to help me move forward with the order.
The new quote feature, however, not so good - I have no idea where it is getting that text from. It’s from a post somewhere on this thread, just not that one!
Additional caveat on this method is that of course capacity lockouts can be hidden by Tesla when using this method. SMT might show such a lockout by showing FPWN value higher than Nominal Full Pack. There are several other scenarios as well. But as far as utility goes, the method is great - it tells you how much available energy your BMS thinks you have before vehicle shut down.
Also, I’m assuming the 82kw is Panasonic and 75kw is LG?
AlanSubie4Life
Efficiency Obsessed Member
No, there's no throttling (capping?) quite like that. But the 82kWh might only be allowed 81kWh or something. And that could be a temporary situation. Usually the FPWN value in SMT matches the actual Nominal Full Pack when the car is new (but appears to not be the case for the 2021 Performance).
But the Energy Screen method gives the available energy, pure and simple. You'll find for your car you will almost certainly get 80kWh or 81kWh for the answer, since it's new.
Of course, if Tesla wanted to really stretch the battery at the risk of failure, there's probably more capacity in there, so in that sense the pack is capped. But the numbers we're talking about here are the numbers that Tesla has deemed are allowed to be used safely. So I am ignoring any of that sort of capping.
In the US both batteries are Panasonic according to all info we have. Europe is different - lots of pack types!
Basically, AFAIK, 2021:
Performance: FPWN 82.1kWh (seems to be limited to about 81kWh)
AWD: FPWN 77.8kWh (no apparent limitation, typically will see around that for a new vehicle with a full pack)
The SMT FPWN (Full Pack When New) is a hard-coded value. The Nominal Full Pack is your vehicle's actual maximum capacity.
The energy screen method provides the Nominal Full Pack value.
(These numbers are from Model 3 but my understanding is the same applies to 2021 Model Y)
There is vehicle-to-vehicle variation in starting capacity too, so I'd expect something like +/-1kWh typically around these starting numbers, for a new vehicle. Though it's pretty rare to see the +1kWh side of things.
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