ForgeAsset / Utilities / Ameren Missouri

Ameren Missouri 3(M) Large General Service — EV fast-charging electricity cost

Ameren Missouri 3(M) LGS is the filed rate schedule ForgeAsset models for DC fast-charging sites in Ameren Missouri territory in Missouri. Energy prices at 11.1¢/kWh flat; the demand side bills $4.73/kW of monthly peak. For one reference Supercharger site held constant across the whole library, that works out to 22.4¢/kWh per dispensed kWh — rank 18 of 86 filed tariffs (1 = least expensive).

Modeled rates

Ameren Missouri's large general service rate — no EV-specific commercial schedule exists, and this is the rare demand charge with no fine print: the current month's peak, a 100 kW floor, and no ratchet. Energy prices at the first block, which spans more volume than a charging site can draw. Figures fold the fuel rider and St. Louis City sales tax; the city's utility gross-receipts tax is not folded pending the ordinance, so in-city bills run higher by that percentage. A rate case filed June 2026 re-bases these figures around mid-2027.

Source: Ameren Missouri 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 18 of 86.

The rest of the Missouri picture

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

Ameren Missouri 3(M) Large General Service — questions

What does Ameren Missouri charge for energy on 3(M) Large General Service?

The modeled rates are 11.1¢/kWh flat. At the model's default time-of-use mix (30% peak, 45% off-peak, 25% super-off-peak) that blends to 11.1¢/kWh.

Does 3(M) Large General Service carry a demand charge?

Yes: $4.73/kW of monthly peak. For a reference 8-stall site at 150 kW per stall that comes to about $5,681 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 22.4¢/kWh per dispensed kWh, rank 18 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.