Complained again to my SC about battery capping for the 3rd or 4th time. I stated that battery charged full prior to SW update, and after SW update it was 12% down, so to make it clear, I'm not complaining about degradation. Car was bought 2 months prior with only 21k miles, and charged full 2 times prior to May 15.
I noted that I've given Tesla 9 months to figure things out and fix this. So my patience has expired.
They provided a battery report that shows mine is 0.1% better than average of the fleet, i.e. nothing's wrong with your battery. To which I replied - I'm well aware of that, I never said there is anything wrong with it, so if there is nothing wrong, why cap it?
No matter how you look at it, 4 years, or 34k miles, 12% is just too much, and considering that I charge no more than 30% at SC, mainly due to trips, and rarely ever to 100% (well nowdays I can't even get to "new" 100% on trips b/c it takes hours, so I charge to new 90% and move). I never let it sit at new 90%+ SOC. Though it does run its pump any time when charged over new 80%, so I'm not even sure I have to worry about it.
SC people I talked to were very nice, understanding and responsive. They were very polite, and listened. We didn't agree, but it was a calm and friendly conversation. I asked them to provide a name at Tesla who I can discuss this further. They said they'll follow up.
The explanations varied, and are all things I've heard before. I'll write them down, though not in order of the conversation. Comments in parentheses are not what i said in response, but comments for the forum):
- It is degradation, normal is about 4% a year (I wish I knew that before I bought it, I thought Elon himself claimed very differently)
- SW update and capping of battery was was done to protect the battery (from what exactly? b/c I do try to take care of it using Tesla's own instructions)
- It is due to the age of the battery (so I guess traveled mileage should directly correlate to times charged? if yes, then 4 years is bad, but 34k miles does not help? If true, then why limit warranty based on mileage?)
- you have a lot of supercharging on your battery (how much SC can I have at 34k miles in 4 years? and even then, with a "lot" of SC, my battery is a bit better than average of the fleet?)
- I asked here what is a lot, and there was no definitive answer here (watch Tesla now define this number as right below what i specified above for my SC ratio)
- new SW was now better able to recognize degradation that existed
- ok, makes sense. Some new important parameter was discovered and added to algorithm. That's called a defect.
- secondly, how was I able to travel more before capping if degradation was already there? - i didn't get an answer to that
- thirdly, that means they sold me the car with severely degraded battery and didn't disclose it (though, this probably won't be significantly relevant complaint)
- I stated that none of these explanations are acceptable to me as this was done at the will of Tesla, without my approval, and I also paid for what they just took away. Furthermore, my car has lost value due to their deliberate action. I've received no explanation why it was done, whether the car is safe or not, etc... This is unacceptable, and I want to speak someone at Tesla before taking next action.
I think this summarizes all the responses we've seen so far. Some are conflicting with each other. Nothing new. The company still has "we are right, you are wrong" attitude. Though it is not at the will or fault of SC employees. None of this makes any sense. The company is simply not standing behind its product based on what we currently see.