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The same Supercharger site, priced on 46 utility tariffs
This table holds one reference site constant — 8 Tesla V4 stalls dispensing 235 kWh per stall per day — and prices its monthly utility bill on every filed tariff in the library. The result spans a 5.0× spread from the least to the most expensive territory, from 15.0¢/kWh to 75.2¢/kWh per kWh dispensed. It reports filed rates and arithmetic; it renders no verdict.
| # | State | Utility & tariff | Blended energy | Demand / month | Bill / month | Effective ¢/kWh |
|---|---|---|---|---|---|---|
| 1 | Michigan | Consumers Energy GP | 13.4¢/kWh | $0 | $8,583 | 15.0¢/kWh |
| 2 | Oklahoma | PSO Schedule PEVC | 13.4¢/kWh | $0 | $8,591 | 15.0¢/kWh |
| 3 | New Mexico | PNM Rate 3F EV Charging | 13.7¢/kWh | $0 | $8,803 | 15.4¢/kWh |
| 4 | Illinois | ComEd Watt-Hour EV class | 14.1¢/kWh | $0 | $9,025 | 15.8¢/kWh |
| 5 | Virginia | Dominion GS-3 EV | 14.3¢/kWh | $0 | $9,176 | 16.0¢/kWh |
| 6 | Missouri | Evergy Missouri West BEVCS | 9.7¢/kWh | $3,060 | $9,281 | 16.2¢/kWh |
| 7 | Alabama | Alabama Power BEVT | 16.9¢/kWh | $0 | $10,848 | 19.0¢/kWh |
| 8 | Kansas | Evergy Kansas Metro BEVCS | 11.8¢/kWh | $3,884 | $11,454 | 20.0¢/kWh |
| 9 | Michigan | DTE Electric D3 | 18.3¢/kWh | $0 | $11,739 | 20.5¢/kWh |
| 10 | Iowa | MidAmerican Rate LS | 6.3¢/kWh | $8,086 | $12,134 | 21.2¢/kWh |
| 11 | North Carolina | Duke Energy Carolinas LGS | 10.2¢/kWh | $6,189 | $12,729 | 22.3¢/kWh |
| 12 | Missouri | Ameren Missouri 3(M) LGS | 11.1¢/kWh | $5,681 | $12,821 | 22.4¢/kWh |
| 13 | Georgia | Georgia Power TOU-EVC-2 | 11.6¢/kWh | $6,117 | $13,517 | 23.6¢/kWh |
| 14 | Missouri | Evergy Missouri Metro BEVCS | 13.5¢/kWh | $5,072 | $13,713 | 24.0¢/kWh |
| 15 | Kansas | Evergy Kansas Central BEVCS | 15.7¢/kWh | $3,816 | $13,844 | 24.2¢/kWh |
| 16 | Oregon | Portland General Schedule 38 | 21.7¢/kWh | $0 | $13,871 | 24.3¢/kWh |
| 17 | Louisiana | Entergy Louisiana LGS-L | 10.2¢/kWh | $8,077 | $14,589 | 25.5¢/kWh |
| 18 | North Dakota | Xcel Energy ND General Service | 23.3¢/kWh | $0 | $14,937 | 26.1¢/kWh |
| 19 | Pennsylvania | PPL GS-3 | 13.8¢/kWh | $6,558 | $15,396 | 26.9¢/kWh |
| 20 | Oklahoma | OG&E PL-TOU SL5 | 7.6¢/kWh | $10,637 | $15,501 | 27.1¢/kWh |
| 21 | Nebraska | OPPD Rate 231 | 7.1¢/kWh | $11,068 | $15,613 | 27.3¢/kWh |
| 22 | Nevada | NV Energy South LGS-3 | 7.2¢/kWh | $11,300 | $15,906 | 27.8¢/kWh |
| 23 | California | PG&E BEV-2-S | 21.5¢/kWh | $2,293 | $16,043 | 28.1¢/kWh |
| 24 | Alabama | Huntsville Utilities EV L3 DCFC | 25.5¢/kWh | $0 | $16,348 | 28.6¢/kWh |
| 25 | Tennessee | Nashville Electric EVC | 26.3¢/kWh | $0 | $16,820 | 29.4¢/kWh |
| 26 | Louisiana | Entergy Louisiana GS-G | 8.7¢/kWh | $11,315 | $16,896 | 29.5¢/kWh |
| 27 | California | SCE TOU-EV-9 | 26.8¢/kWh | $0 | $17,133 | 30.0¢/kWh |
| 28 | South Dakota | Xcel Energy SD General Service | 28.5¢/kWh | $0 | $18,271 | 32.0¢/kWh |
| 29 | Nevada | NV Energy North GS-3 | 7.1¢/kWh | $15,144 | $19,660 | 34.4¢/kWh |
| 30 | California | SDG&E EV-HP | 21.1¢/kWh | $6,130 | $19,669 | 34.4¢/kWh |
| 31 | Louisiana | Entergy New Orleans LE-25 | 7.0¢/kWh | $17,447 | $21,911 | 38.3¢/kWh |
| 32 | Wisconsin | We Energies Cg 3 | 11.9¢/kWh | $14,740 | $22,342 | 39.1¢/kWh |
| 33 | Idaho | Rocky Mountain Power Sch 6 | 6.5¢/kWh | $18,434 | $22,580 | 39.5¢/kWh |
| 34 | Montana | NorthWestern Energy GSEDS-1 | 10.4¢/kWh | $17,228 | $23,880 | 41.8¢/kWh |
| 35 | Idaho | Idaho Power Schedule 19 | 5.4¢/kWh | $20,727 | $24,209 | 42.3¢/kWh |
| 36 | Texas | Austin Energy ≥300 kW | 7.3¢/kWh | $21,161 | $25,806 | 45.1¢/kWh |
| 37 | Florida | FPL GSLD-1 | 6.2¢/kWh | $23,254 | $27,213 | 47.6¢/kWh |
| 38 | North Carolina | Duke Energy Progress LGS | 6.5¢/kWh | $23,767 | $27,927 | 48.8¢/kWh |
| 39 | Wisconsin | MGE Cg-2 | 11.0¢/kWh | $21,262 | $28,327 | 49.5¢/kWh |
| 40 | Tennessee | MLGW GSA Part 3 | 9.7¢/kWh | $22,166 | $28,382 | 49.6¢/kWh |
| 41 | Arizona | APS E-32 L | 6.9¢/kWh | $26,633 | $31,074 | 54.3¢/kWh |
| 42 | Arizona | TEP TILGS | 7.6¢/kWh | $27,774 | $32,658 | 57.1¢/kWh |
| 43 | Nebraska | Lincoln Electric System LLP | 3.1¢/kWh | $32,394 | $34,392 | 60.1¢/kWh |
| 44 | Indiana | AES Indiana Rate SL | 7.7¢/kWh | $31,766 | $36,703 | 64.2¢/kWh |
| 45 | Iowa | Alliant IPL LGS | 5.0¢/kWh | $38,492 | $41,705 | 72.9¢/kWh |
| 46 | Wyoming | Rocky Mountain Power Sch 46 | 3.3¢/kWh | $40,851 | $42,988 | 75.2¢/kWh |
Reference site: 8 stalls at 235 kWh/stall/day (57,183 kWh dispensed per month), a 150kW per-stall demand assumption, the model's default time-of-use mix, and a 12% loss gross-up. Blended energy is the TOU-weighted average of each tariff's filed rates. Rates are digit-verified against each utility's own filed sheets; full derivations are on the methodology page.
Reading the spread
The cheapest and the most expensive territory in the library differ by more than the entire retail margin of many sites — before rent, hardware, or taxes enter the picture. Both columns matter: some territories bill thousands of dollars a month in demand charges for the same connected load, while others carry no demand charge at all and put the cost in the energy rate instead. The demand-charge lookup breaks that single line item out per tariff.
Utility rankings — questions
- What does the effective cost per kWh include?
- For each tariff it takes the reference site's monthly dispensed energy, grosses it up 12% for charging losses, prices it at the tariff's rates using the model's default time-of-use mix, adds the tariff's filed demand charge, and divides the total by the kWh actually sold. It is the all-in utility cost of each kilowatt-hour that reaches a vehicle.
- Why does the same site cost so much more in some territories?
- Two reasons: the filed energy rates themselves differ several-fold between utilities, and demand-charge structures differ even more — some territories bill nothing for peak demand while others bill thousands of dollars a month for the same connected load. The ranking holds the site constant so the spread is attributable to the tariff alone.
- Does a cheap tariff make a site a good investment?
- Electricity cost is one input among many. Utilization, retail price, rent, hardware cost, financing, taxes, and incentives all move the result, and the ranking says nothing about demand at any particular location. The full model prices a specific address across all of these; this table reports what each utility files.
The utility bill is one line of a full model. Run a Tesla V4 Supercharger scenario — payback, NPV, IRR, and a 15-year cash flow from your own inputs, on your territory's filed tariff.
Run a scenarioForgeAsset is software, not investment, tax, or legal advice — outputs are model estimates from stated assumptions, not guarantees. Rates are current as of research; verify current terms with each utility's filed tariff before committing capital.