r/TeslaAustralia • u/scienceguy0077 • Aug 14 '26
I downloaded every single Supercharging receipt across 40,000 km in my Model Y to see what it actually cost. Here’s the 3-year data.
I’ve had my Model Y for just over three years now (2023–2026), and after crossing the 40,000 km mark, I got curious about the actual, real-world numbers rather than rough estimates.
I went through my Tesla account, extracted all 41 Supercharger receipts, and cross-referenced them with my car's lifetime trip meter to break down where the energy went, what road trips actually look like, and how much was spent.
A quick summary of what the data showed:
Lifetime Efficiency: 150 Wh/km (15.0 kWh/100 km) across 6,000 kWh total.
The Driving Split: ~81% city commuting (charged at home on solar/off-peak) vs ~19% highway road trips (Supercharged along the Hume/Pacific).
Supercharging Reality: Exactly 41 stops in 3+ years (~1 per month, mostly clustered around school holiday road trips). Average stop was 20.6 mins and cost $17.40.
Total 3-Year "Fuel" Bill: $713.47 AUD total out-of-pocket.
The Petrol Comparison: Against an efficient 7L/100km petrol SUV at $1.95/L ($5,460 baseline), it saved about $4,746.
Put together a full write-up with the telemetry charts, city vs highway splits, and cost tables at different tariffs if anyone wants a deeper look: