Data as of
9/15/2026
My Numbers
Actual odometer miles
31,444
Completed Supercharger sessions
245
Total energy purchased
10,931kWh
Energy per mile
Actual
348Wh/mi
Tesla-Rated
270Wh/mi
Average charge time
29.1minutes
Tesla-rated figures use 158 sessions because Tesla-rated miles weren’t recorded for the first 41 sessions.
10/22/2024-9/15/2026
10,900 kWh Supercharger (99.7%)and33 kWh Other (0.3%)
data compiled by Tesla app
30 minutes of charging
132
Actual miles
170
Tesla-rated miles
Per 1,000 miles
3.8
Charging hours
7.8
Charging stops
Total Supercharging cost
$4,236
Supercharging cost per actual mile
13.5¢
Average energy cost per kWh
38.8¢
THE LONG-TERM QUESTION
What happened to the battery?
Nearly two years. More than 31,000 miles. Almost every kilowatt-hour bought at a Supercharger.308 MI
NEWOCT 23, 2024
289 MI
18,859 MILESNOV 18, 2025
281 MI
31,445 MILESSEP 13, 2026
8.8%
LOWER
LOWER
27 fewer displayed miles than when new.
The car’s displayed rated range at a full charge moved from 308 to 281 miles over 31,445 miles of real-world use.
This is what the car displayed—not a laboratory measurement of battery capacity, and not proof that Supercharging caused the change.
What does this mean for battery life?OUTBOUND RESULTS
5,222 miles west.
One result stands out.
Charging the way Tesla’s route planner wanted—arriving lower, using the faster part of the charging curve, and leaving sooner—changed the numbers.REAL-WORLD MEASUREROUTINE DRIVINGWESTBOUNDCHANGE
Energy per actual mile356305−14%
Actual miles per 30 charging min.128157+23%
Charging hours per 1,000 miles3.93.2−18%
Cost per actual mile13.7¢12.6¢−8%
Stops per 1,000 miles7.68.6+13%
Shorter charges. More often. Better results.
Westbound charging stops were more frequent, but the car gained more real miles per charging minute and used less energy per mile.
THE RETURN EXPERIMENT
Oregon → New Hampshire.
Chill mode only.
Can gentler acceleration reduce energy use and cost per mile? Results come after the return trip.Outbound-only, real-world data. Weather, terrain, traffic, speed, and charging prices varied. “Routine” driving was overwhelmingly within roughly 100 miles of home and predominantly in Standard mode.