A 2.13x Price Spread on One Network: What 15 Tesla Supercharger Invoices Reveal About Real-World Charging Costs
By Myunghyeon "Miles" Yu · Published Nov 14, 2026
TESLA SUPERCHARGER BILLING · OCT 1–4, 2026
2.13xHighest / lowest effective billed rate
15Recorded charging sessions
$109.90Total billed, including applicable taxes
$0.332/kWhEnergy-weighted effective billed rate
330.85 kWh across four states. Effective billed rate = total billed ÷ delivered kWh. These are one driver's recorded sessions, not Tesla's network-wide tariff or statewide averages.
Based on unedited Tesla charging invoice data contributed by Bob Wilson (InsideEVs Forum)
Overview: Real Invoices vs. Flat Rate Assumptions
Most models of electric vehicle highway running costs rely on uniform flat-rate estimates rather than station-by-station billing records.
To examine how commercial public fast-charging prices actually behave on interstate travel corridors, GearUp Insights analyzed an unedited 15-session Tesla Supercharger billing export contributed by EV community member Bob Wilson (bwilson4web). The records document 15 charging sessions in Texas, Arkansas, Mississippi, and Tennessee between October 1 and October 4, 2026. The billing records alone do not establish the complete driving route or distance.
Across all 15 recorded sessions, the raw billing export indicates:
- Total Energy Delivered: 330.85 kWh (sum of recorded base quantities)
- Total Amount Billed (inc. taxes): $109.90
- Weighted Effective Rate: $0.332 per kWh (Calculation: Total Spend $109.90 ÷ Total Delivered Energy 330.85 kWh)
However, the headline average masks the primary finding in the dataset: within the exact same proprietary charging network, observed effective billed rates ranged from $0.188/kWh to $0.400/kWh—a 2.13x price spread.
Below is the complete dataset of those 15 sessions and an objective breakdown of what the invoices record.
Effective Cost per kWh: Observed Ranking Across All 15 Sessions
Observed Effective Cost per kWh · 15 Supercharger Sessions (Ranked)Corinth, MS (#15)$0.400/kWh
Corinth, MS (#1)$0.400/kWh
Brinkley, AR (#3)$0.390/kWh
Greenville, TX (#6)$0.390/kWh
Plano Windhaven, TX (#7)$0.379/kWh
Richardson, TX (#8)$0.370/kWh
New Boston, TX (#11)$0.350/kWh
Sulphur Springs, TX (#10)$0.350/kWh
Little Rock, AR (#4)$0.270/kWh
Little Rock, AR (#13)$0.270/kWh
Memphis, TN (#14)$0.260/kWh
Horn Lake, MS (#2)$0.209/kWh
Plano W Parker, TX (#9)$0.188/kWh
Weighted Average (All 15 Sessions)$0.332/kWh
USD/kWh (total billed inc. tax ÷ delivered kWh). All bars start at zero and share a $0.45/kWh scale. Observed spread: 2.13x ($0.4000 ÷ $0.1878).
The 15-Session Supercharger Invoices Dataset
All figures below are drawn directly from the unedited Tesla billing export CSV (Tesla_Charging_History_2026-11-06T23-17-08.257Z.csv). Effective cost per kWh reflects the total billed amount (including any applicable taxes) divided by delivered energy.
On a phone: swipe the table horizontally to see all eight columns.
| # | Charge Start (Local Time) | Location | State | Energy Delivered | Stated Unit Rate | Total Billed (Inc. Tax) | Effective Cost/kWh |
|---|
| 1 | Oct 01, 11:36 PM | Corinth | MS | 17.83 kWh | $0.40/kWh | $7.13 | $0.400/kWh |
| 2 | Oct 02, 01:26 AM | Horn Lake | MS | 15.80 kWh | $0.21/kWh | $3.31 | $0.209/kWh |
| 3 | Oct 02, 03:02 AM | Brinkley | AR | 22.55 kWh | $0.39/kWh | $8.79 | $0.390/kWh |
| 4 | Oct 02, 04:35 AM | Little Rock | AR | 30.49 kWh | $0.27/kWh | $8.23 | $0.270/kWh |
| 5 | Oct 02, 07:54 AM | Nash | TX | 29.90 kWh | $0.35/kWh | $10.46 | $0.350/kWh |
| 6 | Oct 02, 10:12 AM | Greenville | TX | 16.85 kWh | $0.39/kWh | $6.57 | $0.390/kWh |
| 7 | Oct 02, 01:39 PM | Plano (Windhaven Pkwy) | TX | 13.05 kWh | $0.38/kWh | $4.95 | $0.379/kWh |
| 8 | Oct 02, 11:46 PM | Richardson | TX | 22.40 kWh | $0.37/kWh | $8.28 | $0.370/kWh |
| 9 | Oct 03, 12:23 AM | Plano (West Parker Rd) | TX | 4.47 kWh | $0.19/kWh | $0.84 | $0.188/kWh |
| 10 | Oct 03, 06:57 PM | Sulphur Springs | TX | 19.78 kWh | $0.35/kWh | $6.92 | $0.350/kWh |
| 11 | Oct 03, 08:29 PM | New Boston | TX | 22.35 kWh | $0.35/kWh | $7.82 | $0.350/kWh |
| 12 | Oct 03, 09:51 PM | Hope | AR | 27.83 kWh | $0.39/kWh | $10.85 | $0.390/kWh |
| 13 | Oct 04, 12:38 AM | Little Rock | AR | 30.06 kWh | $0.27/kWh | $8.11 | $0.270/kWh |
| 14 | Oct 04, 04:42 AM | Memphis (S Highland St) | TN | 38.18 kWh | $0.26/kWh | $9.92 | $0.260/kWh |
| 15 | Oct 04, 08:15 AM | Corinth | MS | 19.31 kWh | $0.40/kWh | $7.72 | $0.400/kWh |
| TOTAL | Oct 01 – Oct 04, 2026 | 15 Sessions | 4 States | 330.85 kWh | — | $109.90 | $0.332/kWh |
Note on table rounding: Individual energy entries are rounded to two decimal places from the original CSV. The displayed entries sum to 330.85 kWh; the unrounded CSV quantities sum to 330.8522 kWh. Effective rates are calculated from unrounded quantities and then displayed to three decimals.
State-Level Summary
By state: this driver's recorded sessionsTennessee · 1 session$0.260/kWh
Arkansas · 4 sessions$0.324/kWh
Mississippi · 3 sessions$0.343/kWh
Texas · 7 sessions$0.356/kWh
USD/kWh. All bars start at zero on the same $0.45/kWh scale as the session chart. Energy-weighted rates; Tennessee has only one session. These are not statewide averages.
The chart and table below group only these recorded sessions by state. Each rate is the state group’s total billed amount divided by its delivered kWh; none is a statewide market average.
| State | Recorded Stops | Total Energy | Total Cost | Stated Rate Range | Weighted Effective Rate |
|---|
| Tennessee | 1 | 38.18 kWh | $9.92 | $0.26/kWh | $0.260 / kWh |
| Arkansas | 4 | 110.93 kWh | $35.98 | $0.27 – $0.39/kWh | $0.324 / kWh |
| Mississippi | 3 | 52.94 kWh | $18.16 | $0.21 – $0.40/kWh | $0.343 / kWh |
| Texas | 7 | 128.80 kWh | $45.84 | $0.19 – $0.39/kWh | $0.356 / kWh |
| Overall | 15 | 330.85 kWh | $109.90 | $0.19 – $0.40/kWh | $0.332 / kWh |
Note: Tennessee represents a single session in Memphis rather than a statewide average. Mississippi sum (52.94 kWh) reflects two Corinth sessions (17.83 + 19.31 kWh) and one Horn Lake session (15.80 kWh).
Factual Takeaways from the Invoices
1. The 2.13x Single-Network Price Spread
The highest effective billed rate in this sample was 2.13 times the lowest. This compares total billed amounts per delivered kWh across sessions, not a ratio of Tesla’s posted base tariffs:
- Lowest Observed Unit Rate: $0.19/kWh ($0.188/kWh effective billed rate, Plano, TX).
- Highest Observed Unit Rate: $0.40/kWh ($0.400/kWh effective, Corinth, MS).
- Observed Ratio: The highest effective rate was 2.13 times the lowest effective rate within the same charging provider ($0.4000 ÷ $0.1878 = 2.13x; or $0.400 ÷ $0.188 = 2.13x).
2. Location-to-Location Rate Divergence
The invoices document wide rate variations across different locations within relatively close regional corridors:
- Across the 7 Texas sessions, rates ranged from $0.19/kWh (Plano West Parker Rd) to $0.39/kWh (Greenville).
- Across the 4 Arkansas sessions, rates split into two tiers: $0.27/kWh at Little Rock (both visits) versus $0.39/kWh at Brinkley and Hope.
- In Mississippi, Corinth billed at $0.40/kWh across both visits, whereas Horn Lake billed at $0.21/kWh.
Note on causality: The export documents these specific price points at these stations, but does not provide station-level utility rate schedules or demand-charge data to isolate the underlying pricing drivers.
3. Session Volume Distribution
- Mean Delivered Energy: 22.06 kWh per stop.
- Median Delivered Energy: 22.35 kWh per stop.
- Intake Distribution:
- Small Top-ups (< 15 kWh): 2 sessions (13.3%) — Plano West Parker (4.47 kWh), Plano Windhaven (13.05 kWh)
- Standard Charges (15–25 kWh): 8 sessions (53.3%) — Corinth (x2), Horn Lake, Brinkley, Greenville, Richardson, Sulphur Springs, New Boston
- Larger Charges (> 25 kWh): 5 sessions (33.3%) — Little Rock (x2), Nash, Hope, Memphis
10 of the 15 recorded sessions delivered less than 25 kWh.
Methodological Scope & Limitations
To ensure factual transparency, the boundaries of this dataset are explicitly defined:
- Single Driver, Four-Day Billing Sample: This dataset records 15 charging sessions from one driver during October 1–4, 2026. The records do not establish the complete trip route, mileage, or total travel cost. It is not a statistical census, a nationwide average, or an evaluation of typical Supercharger pricing across all regions.
- Billing Invoices, Not Vehicle Telemetry: The records consist of Tesla commercial billing invoices. They record charge start timestamps, delivered kWh, stated rates, and total billed amounts. They do not record odometer readings, trip mileage, vehicle efficiency (mi/kWh), battery arrival/departure state of charge (SOC), or charging duration.
- No Independent Utility or Bank Audit: Figures reflect the unedited values present in the Tesla invoice export. External bank statements, credit card processing fees, or local electric utility tariffs were not independently audited.
- Weighted vs. Unweighted Averages: The reported average ($0.332/kWh) is an energy-weighted effective rate ($109.90 ÷ 330.85 kWh), not a simple arithmetic mean of the 15 session effective rates ($0.331/kWh).
Plan with Your Own Charging Mix
These 15 invoices illustrate that commercial DC fast charging on a single provider network exhibits significant price dispersion—ranging in this sample from under $0.20/kWh to $0.40/kWh. Prospective EV buyers and highway travelers should anticipate variable corridor charging rates rather than modeling long-distance travel on a fixed tariff.
We express our appreciation to Bob Wilson (bwilson4web) for voluntarily sharing his unedited billing export to support factual, transparent EV research.