ForgeAsset / Utilities / Tucson Electric Power (TEP)

Tucson Electric Power (TEP) DCFCX — EV fast-charging electricity cost

TEP DCFCX Stand-Alone EV Charging is the filed rate schedule ForgeAsset models for DC fast-charging sites in Tucson Electric Power territory in Arizona. Energy prices at 4.0¢/kWh–8.3¢/kWh by time of day; the demand side bills none. For one reference Supercharger site held constant across the whole library, that works out to 6.4¢/kWh per dispensed kWh — rank 1 of 86 filed tariffs (1 = least expensive).

Modeled rates

TEP's filed stand-alone EV charging rate for the Tucson metro: there is no per-kilowatt demand charge — delivery cost is recovered through energy priced in declining blocks keyed to each month's energy per kilowatt of billing demand, which the model expresses as load-factor tiers (a per-kilowatt amount plus a per-kilowatt-hour rate, assigned from the modeled load factor each model year). A month whose load factor differs from the year's assigned tier bills at or above the filed blocks, never below. Supply rates are time-differentiated and month-weighted across TEP's summer and winter seasons. As filed, the rate applies where electricity is primarily consumed by separately metered EV charging stations; it carries no enrollment cap or sunset, and resale of charging energy is allowed. Rates fold TEP's rider stack plus the 5.6% state utilities transaction privilege tax; Tucson city tax (~+8.1 points) is site-dependent and not included. A general rate case is pending with new rates anticipated late 2026 — these rates carry a short shelf life.

Source: Tucson Electric Power (TEP) 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 1 of 86.

The rest of the Arizona picture

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

Tucson Electric Power (TEP) DCFCX — questions

What does Tucson Electric Power (TEP) charge for energy on DCFCX?

The modeled rates are 4.0¢/kWh–8.3¢/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 5.7¢/kWh.

Does DCFCX carry a demand charge?

No separable demand charge is billed under the modeled structure — the cost sits in the energy rates instead.

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 6.4¢/kWh per dispensed kWh, rank 1 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.