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Rocky Mountain Power (Wyoming) Schedule 46 — EV fast-charging electricity cost

Rocky Mountain Power Sch 46 is the filed rate schedule ForgeAsset models for DC fast-charging sites in Rocky Mountain Power territory in Wyoming. Energy prices at 2.9¢/kWh–4.3¢/kWh by time of day; the demand side bills $34.04/kW of monthly peak. For one reference Supercharger site held constant across the whole library, that works out to 75.2¢/kWh per dispensed kWh — rank 79 of 86 filed tariffs (1 = least expensive).

Modeled rates

Rocky Mountain Power's Wyoming large-service TOU rate: very cheap flat energy against the heaviest demand stack of the covered Rocky Mountain jurisdictions — an on-peak window component, a facilities component on trailing demand, and a load-size component, each of which resolves to the monthly peak for a site drawing its hardware peak daily. Figures fold Casper's 5% sales tax and 7% municipal franchise fee. A rate case requesting about 8.8% is pending with an order expected in early 2027; the library re-derives at the order. Cheyenne is Black Hills Energy territory, which is not yet offered.

The filed rate book for this territory records no EV-specific commercial rate, so the modeled cost is the standard schedule. Demand follows the model's conservative convention — 150 kW per stall billed every month, the worst-case coincident peak — so a site whose metered peak runs below that would see a lower demand line.

Source: Rocky Mountain Power (Wyoming) filed rate schedule. Rates are digit-verified against the utility's own filed sheets and update within two weeks of any revision; derivations are on the methodology page.

What the reference site pays here

Reference site: 8 Tesla V4 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 — identical to the full utility ranking, where this tariff sits at position 79 of 86.

The rest of the Wyoming picture

The tariff is one layer. State taxes, incentives, clean-fuels programs, and the charging market shape the remainder — Tesla Supercharger ROI in Wyoming covers them, and the US Supercharger Economics Map shows every US Supercharger over utility territories colored by this same effective-cost derivation.

Rocky Mountain Power (Wyoming) Schedule 46 — questions

What does Rocky Mountain Power (Wyoming) charge for energy on Schedule 46?

The modeled rates are 2.9¢/kWh–4.3¢/kWh by time of day. At the model's default time-of-use mix (30% peak, 45% off-peak, 25% super-off-peak) that blends to 3.3¢/kWh.

Does Schedule 46 carry a demand charge?

Yes: $34.04/kW of monthly peak. For a reference 8-stall site at 150 kW per stall that comes to about $40,851 per month.

What does electricity cost per kWh dispensed on this tariff?

For the reference site — 8 Tesla V4 stalls dispensing 235 kWh per stall per day, with a 12% loss gross-up — the all-in utility cost works out to 75.2¢/kWh per dispensed kWh, rank 79 of 86 tariffs in the library (1 = least expensive).

ForgeAsset is software, not investment, tax, or legal advice — outputs are model estimates from your inputs, not guarantees. Rates current as of research; verify current terms with the utility's filed schedule before committing capital.