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US Supercharger Economics Map

Every US Tesla Supercharger, over a map of utility territories colored by the derived effective electricity cost per dispensed kWh under each utility's currently filed tariff. Energy rates, demand charges, and charging losses are folded into one number per territory — the operator-side cost a posted energy rate does not show.

Of the 3,167 Superchargers shown, 49.2% sit in a territory with a fully modeled tariff, 48.9% in a territory known by name whose rates are not yet modeled, and 1.9% outside the bundled territory data. The map fills in as more filed tariffs are derived.

outside known territory data
Stalls
Opened

Derived effective electricity cost per dispensed kWh under each utility's filed tariff, at the reference operating profile. Legend chips and the station controls above filter the map. Methodology

Reference profile: 30% peak / 45% off-peak / 25% super-off-peak energy mix, 150 kW per stall subscribed and billed, 12% charging losses — the model's default scenario, applied identically to every territory. Tariffs as derived on 2026-07-21; station list as of 2026-07-21. Territory boundaries are simplified for display and approximate per the source data; the wizard's address lookup is the authoritative territory answer.

Model a site in any territory

Frequently asked questions

What does the color of a territory show?

The derived effective electricity cost per dispensed kWh under that utility's currently filed tariff, at a fixed reference operating profile. It folds together time-of-use energy rates, the tariff's demand charge structure, and charging losses, divided by the kWh actually dispensed. Where a utility has more than one modeled tariff, the fill uses the lowest-cost row and the popup lists every row.

Why are some territories gray?

Gray territories are utilities the map knows by name and boundary whose filed rates are not yet modeled in the tariff library. The wizard accepts rates for those territories as manual inputs, and territories move from gray to colored as their filed tariffs are derived.

Where do the numbers come from?

Each rate is derived from the utility's own filed tariff sheets — seasonal rates month-weighted into annual time-of-use buckets, with the filed demand charge structure applied. The same derivation runs in the test suite as an economic-plausibility gate, so the numbers published here are the numbers the model is tested against. The full method is on the methodology page.

Why does the effective cost differ from the utility's posted energy rate?

Demand charges and charging losses are part of what a DC fast-charging site pays but do not appear in a posted per-kWh energy rate. In territories with heavy demand charges, the effective cost per dispensed kWh can be a multiple of the posted energy rate at the reference profile's utilization.

How current is the map?

Tariff-derived costs were last computed on 2026-07-21; the station list was last refreshed on 2026-07-21. Rates are re-derived when utilities file revisions, and the map is rebuilt from the same library the modeling wizard uses.

State-by-state tariff detail

Each covered state has a page listing the modeled utilities, filed tariff structures, and the state's tax treatment of charging revenue.

The same tariff library, ranked as a table: utility rankings.