I daily charge to 100%, and I'm now only getting 249 miles at 100%. It started declining from 253-254 around 2 weeks ago. 2400 miles on the odo. I'm going to stop daily charging to 100% and instead charge to 70% - 80% and see if there is any improvement. But yeah, I agree...most people probably don't need to charge to 100% every night.
Also, I have a mobile service appt tomorrow, will ask them if they've seen this decline on other LFPs around me.
EDIT: I just got a phone call from Tesla Service. They ran diagnostics on my battery, and didn't find anything wrong or any actual degradation. He blamed the lower displayed range on algorithms, third party apps, and driving habits. He said the battery was 'just a hair' below 100%. He recommended that I uninstall any third party apps, as well as change my Tesla account password because they are preventing the car from going into sleep mode (I think he said about 60% of the time? ). Basically it sounds like the apps could be keeping some systems on, sapping a little bit of energy? Half of what he said was basically Greek to me, but that was my overall take.
Also, he said while you can charge to 100% daily, he doesn't recommend it unless you really need the range. And that even the LFP pack can 'learn' a lower range. Also recommended me to drive to below 30%, then charge to 100%. I don't think I've ever gotten below 30% except for when I took delivery (the car only had 70 miles of range)
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