Alternator & ChargingDiagnostic helpCommunity Starter

2021 Tesla Model S — fast charging tapers earlier than it used to

EVBuilder533Community StarterMar 12, 20262021 Tesla Model S Long RangeNationwide
2021 Tesla Model S Long Range, about 58,500 miles. On comparable road trips the charge rate now starts tapering sooner. I am trying to separate charger sharing, battery temperature, software changes and actual battery health. Interested in real owner experience more than guesses.
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TrackCommuter97Community StarterCommunity StarterMar 12, 2026permalink
Ask what changed right before it started. Two 2021 Tesla Model Ss can feel identical and have different causes, so measure before you copy someone else's repair. You'll know quickly if you're on the wrong tree. This is from a 2021 Tesla Model S in Nationwide with 58,500 miles. If it doesn't change the out-the-door or the repair estimate, it's noise. I'm in no rush to be a hero on it.
UsedCarCommuter769Community StarterCommunity StarterMar 13, 2026permalink
Quick add on that: If a shop can't duplicate it on the 2021 Tesla Model S, bring a video plus freeze-frame data, not just a story. Don't erase codes until someone who can help has seen them. Any freeze-frame data saved? No warning lights, which is why I'm documenting it.
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