So I'm not gonna read through 133 pages of comments, but wanted to provide some battery data for my July '21 build SR+. Been charging it to 90% each time aside from 1 100% charge. Usually let it drain to 20-30% before charging back up. From what I've gathered, the calculated range loss is pretty much on par with what I should expect after ~1,800 miles? Data courtesy of Teslafi:
View attachment 702031
Yeah assuming TeslaFi's projections are good, you're at about 260/263*53.5kWh = 52.9kWh for your "55.4kWh" battery (which typically starts at about 53.5kWh).
I'm making the argument it's not normal. My car has 6k miles 36 charge cycles in 2 months on it, and I have a Nominal Full Pack of 76.3 on a 82.1 pack?
You're below average for your vehicle, but it's still normal. Note that your pack started around 79kWh for a Model Y with 331 miles of range. Note the EPA rating is 326 miles of range which corresponds to 77.8kWh or so.
You're now at 76.3kWh, with around 320 miles of range.
So depending on how you look at it, you've lost 2% of your capacity, or 3.5-4%. This is all quite normal. You have 6k miles in two months too so you are putting some miles on it, which will impact capacity.
I was happily trending on 329miles for weeks, and as if the BMS lost it's mind I'm off 3-4% from New already
Looks like you probably never saw above 329 miles (a little hard to say), which means you started with a slightly worse pack than most Model Y owners, at 78.5kWh; many start with a bit over 79kWh. So actually you've only lost 2.9%.
I'm shocked that with the headroom buffer that Tesla sets, why am I seeing this already?
There isn't really any headroom buffer on Model Y LR since it starts at a 79kWh degradation threshold, corresponding to 331 rated miles displayed (the EPA rating is 326 rated miles), and many people see right around that 79kWh value and 330-331 rated miles at a full charge. So you'll see loss pretty much as soon as the capacity starts reducing, on that vehicle. (This behavior is different for different vehicle models - it all depends on the positioning of the degradation threshold relative to the full pack capacity.)
We've been very careful how we've treated this pack. Our charges have been reasonable in the times we've had it.
Generally I'd suggest using 60-70% SoC for your charges if it's convenient for you to do so. You'll slow down the aging a bit in theory. Just charge it every day. Whether this actually will make a difference is unclear - so only do it if it's actually convenient. If it's a pain, use a higher charge level.
I've watched every single Calibration video, and read many of these range loss threads.
There isn't really such a thing as "calibration" in most cases. In almost all cases I've seen reported, the BMS is correctly capturing the state of the pack. There are examples where it is way off (see here for a 20% recovery from 60kWh to 74kWh), but that's unusual. Yeah, you might see 1-2kWh adjustment here and there, possibly dependent on your daily charge level choice, but there are so many variables it's a bit difficult to ascribe that to the actual "calibration."
So I don't easily accept the party line answer of "it's normal".
Well, it pretty much is, historically, normal to lose about 10% capacity over the first couple years. There are (of course!) exceptions (see
@KenC for example!), but that should be the expectation. It's a lottery, some people get better results, others get worse - largely unrelated to how they treat their battery.
Whether we'll see that same behavior for the 2170L packs is TBD. Maybe time will tell and you'll actually be shown to have a much worse pack than everyone else (because the other 2170L packs happen to show much reduced degradation vs. the 2170 packs). But we have no idea.
Anyway, back to Model 3!