ForgeAsset / Utilities / Idaho Power

Idaho Power Schedule 19 — EV fast-charging electricity cost

Idaho Power Schedule 19 is the filed rate schedule ForgeAsset models for DC fast-charging sites in Idaho Power territory in Idaho. Energy prices at 5.0¢/kWh–6.1¢/kWh by time of day; the demand side bills $17.27/kW of monthly peak. For one reference Supercharger site held constant across the whole library, that works out to 42.3¢/kWh per dispensed kWh — rank 52 of 86 filed tariffs (1 = least expensive).

Modeled rates

Idaho Power's large-power schedule on the 2026 settlement compliance rates: three-period time-of-use energy with seasonal demand, month-weighted to annualized figures and folded with the power-cost adjustment, efficiency rider, and Boise's 1.5% franchise fee. The demand figure sums the all-hours base charge, a basic charge billed on trailing twelve-month demand, and a summer evening-window component — both of the latter resolve to the monthly peak for a site that draws its full hardware peak daily, and the mapping only overstates where that assumption bends. The power-cost adjustment resets each June 1.

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: Idaho Power 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 52 of 86.

The rest of the Idaho picture

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

Idaho Power Schedule 19 — questions

What does Idaho Power charge for energy on Schedule 19?

The modeled rates are 5.0¢/kWh–6.1¢/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 5.4¢/kWh.

Does Schedule 19 carry a demand charge?

Yes: $17.27/kW of monthly peak. For a reference 8-stall site at 150 kW per stall that comes to about $20,727 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 42.3¢/kWh per dispensed kWh, rank 52 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.