2015 Model S 85D 2 Years of ONLY Supercharging – Battery Report, Maintenance and more

January 19th, 2025





Continuing last year’s post, here are my results from 2 years of almost exclusively using superchargers to charge my Model S.

A snippet of my battery degradation after 2 years, data from TeslaFi.

A snippet of my battery degradation after 2 years, data from TeslaFi.

Today marks 2 years of owning my Model S. I will cover all the maintenance, repairs, and battery degradation reports since last year.

Battery Degradation Report

We’ll start with the most interesting data. Here’s a graph from TeslaFi showing the estimated battery range at 100%. This includes all charges over the last year with an ending point of 60% or greater.

2024 2025 Odometer Estimated 100% Range My Battery Range Fleet Average Range Year Markers 92,730 94,187 96,625 99,231 101,651 104,348 107,155 109,613 112,819 114,679 117,042 118,960 121,631 123,870 125,214 127,901 230 240 250 260

When new, the car should report 270 miles of available range. When I first purchased the car, my starting range was around 252.5 miles at full, with 92,700 miles on the odometer. In the two years since, the range has followed a pretty steady trend downward, as is to be expected. It currently sits at 239.92 miles when full, representing a roughly 40-mile range loss over the ~128k miles it has traveled.

The range has decreased roughly ~12.5 miles since I got it, while I have put 32,500 miles on it. This amounts to a loss of 1 mile of range about every 2500 miles driven.

Since last year, I have driven the car 14,830 miles, and the battery has lost 7.5 miles of range. This shows increased degradation of roughly a mile of range loss every ~2k miles driven. We started seeing much higher degradation around the 120k mark.

Charging Habits/Data

Supercharging kWh Added: 98.8 % Total AC Charges kWh Added: 1.4 % Supercharging kWh Added ​Charges: 98.6%

I have now supercharged 442 times at 107 different supercharging locations totaling 13,773 hWh taking a total of 12 days and 1 hours with an average charge time of 40 mins.

Road Trips

Everywhere I have charged in 2 years of ownership.

Everywhere I have charged in 2 years of ownership.

I visited 21 new superchargers in 2024, though many of these were just new locations that opened up near me.

Maintenance

My biggest maintenance cost was replacing the high-voltage battery fuse. This cost me $323.56.

Other than that my entire cost breakdown is as follows:

  • 4 new tires – $742

I had a failure of my MCU as well but this was replaced out of warranty for free on goodwill by my local service center.


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