Charge calibration
A reading from each uninterrupted home AC charge that rises ≥ 30% (e.g. 40%→75%). 5+ readings before we show a result.
Not just a charge percentage — a full measurement system: health, capacity, degradation, consumption, idle drain, charging efficiency, plus a live BMS stream: cell balance, module temperatures and safety indicators. Built so you know your battery’s value before you have to ask.
Figures on this page are illustrative marketing samples — not a real user’s data.
A Model 3 Performance dashboard mock — showing the depth TeslaX collects.
We compare gross and usable capacity when new with the current estimate from qualifying charge sessions — plus a per-vehicle error bound capped at 100%.
Model 3 Performance Highland reference — marketing sample.
Each point is one trip. The dashed line is your median baseline. Above baseline = climate, speed or load; below = more efficient driving.
We measure daily drain with no driving or charging, and separate calm days from Sentry or connected-app days.
Every figure has a source: qualifying AC charges, median/regression, confidence, and time trends — not a random guess.
A reading from each uninterrupted home AC charge that rises ≥ 30% (e.g. 40%→75%). 5+ readings before we show a result.
Raw estimate from median/regression of qualifying sessions, then an optimistic bound from that vehicle’s own spread.
Low/medium/high confidence from sample count, stability and history length — plus factors like high variance or short history.
We separate stability from normal slow decline and sharp drops that deserve attention.
Pack chemistry and reference capacities by model, trim and year vs the live estimate.
Export a battery-health certificate and monthly PDF for sale or follow-up.
TeslaX reads the Battery Management System live over Tesla’s official stream: module temperatures, cell-group balance, pack voltage & current, the HV safety loop and isolation resistance — data that used to require diagnostic hardware.
The pack is made of series cell groups that should sit at equal voltages. A small steady spread = a balanced pack; a growing one = a group worth watching. TeslaX shows the live spread and captures a daily snapshot to chart the trend across weeks.
Automatic server-side health alerts: an HVIL safety-loop fault, low isolation resistance, a high cell-group voltage spread, module-temperature imbalance while charging, and a battery heater running in hot weather — pushed the moment they’re detected.
The BMS stream is available for cars connected over Fleet Telemetry (requires virtual-key pairing).
Download TeslaX, link via Tesla OAuth, and let calibration build itself from your home charges.
All figures and charts on this page are marketing illustrations only.