Model S/X 90 kWh: faster degradation than 85
What is known
- Per owner data and discussions, 90 kWh packs (built ~2015–2017) often show noticeable degradation in the first years compared to 85 kWh.
- "Chronic" structural issues (like in early 85s) are fewer in 90s.
A gentle charge profile (50–80% daily), avoiding long-term storage at 90–100% and careful DC fast charging will curb degradation.
Links
- Tesla's general fleet degradation update: https://electrek.co/2023/04/25/tesla-update-battery-degradation/
- Context on silicon in the anode and trade-offs: https://chargedevs.com/features/tesla-tweaks-its-battery-chemistry-a-closer-look-at-silicon-anode-development/
- Discussion on 90 kWh: https://teslamotorsclub.com/tmc/threads/model-x-90kwh-battery-pack-degradation.103845/
Sources
- https://electrek.co/2023/04/25/tesla-update-battery-degradation/
- https://chargedevs.com/features/tesla-tweaks-its-battery-chemistry-a-closer-look-at-silicon-anode-development/
- https://teslamotorsclub.com/tmc/threads/model-x-90kwh-battery-pack-degradation.103845/
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