Same Tesla Model X Plaid (2023), Two Real Users, Two Very Different Outcomes

We conducted this analysis because one user suggested that it would be helpful to examine his data. He already knew that his charging and driving style was quite tough and wanted to confirm it through actual data.

On the left are their SOH trends. One vehicle has decreased to about 78%, while the other remains around 86%. Even with the same model and year, the SOH decline can vary noticeably from user to user.

On the right are the voltage-deviation results from a single charging session. Voltage deviation reflects how evenly the cells inside the pack respond during charging. In one case, the deviation reaches about 0.08 V, while the other stays closer to 0.04 V.

What these two examples show is that individual charging patterns can lead to clear differences in both SOH and cell-balancing behavior. The user with larger voltage deviation also happens to show a faster SOH decline, and the relationship is consistent across both graphs.

These box plots make the difference between the two Model X Plaid users very clear.

The left side is a typical user, and the right side is the user whose SOH and voltage deviation were noticeably worse in the earlier graphs.

Charging (top row): For charging, the difference shows up mainly in the level of current. The user on the right has a noticeably higher median charging current and more high current spikes. In other words, this user charges at higher current levels more often.

Driving (bottom row): During driving, the contrast becomes even clearer. The right-side user has both a higher median current and a much wider distribution. The pack current spreads across a larger range and reaches higher peaks compared to the typical user. The left-side user stays in a more moderate and narrower current band.

The data shows that one user regularly draws higher current from the battery during both charging and driving. The difference is especially visible in driving sessions where the range of current is much wider. The other user operates the battery under lower and more stable conditions. This aligns with the earlier findings that the user with higher and more variable current also happens to show faster SOH decline and larger voltage deviation.