2026 Rivian R1S Dual Large Plus (22in): home charging cost in South Dakota

At South Dakota's residential electricity rate of 14.33¢/kWh, a 2026 Rivian R1S Dual Large Plus (22in) (rated 40.9 kWh per 100 miles by the EPA) costs $5.86 to drive 100 miles on home charging, against $16.02 for the same distance in a car averaging 25.5 mpg on gasoline at $4.085/gallon. Charging at home is much cheaper than gas here: 63.4% less than gas per mile, here specifically.

Annual cost, at 15 thousands miles a year

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2026 Rivian R1S Dual Large Plus (22in) charged at home in South Dakota costs about $879/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,524 a year.

Cost of a full charge

A 2026 Rivian R1S Dual Large Plus (22in) needs roughly 135 kWh to reach its EPA-rated 330-mile range, which runs about $19.34 at 14.33¢/kWh in South Dakota.

Where this ranks

This combination ranks 8,776 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Dual Large Plus (22in) alone ranks 278 of 400 models for efficiency; South Dakota alone ranks 14 of 51 states for electricity price.

Next step: home charger installation

The numbers above assume Level 2 home charging is already in place — the electrical work behind that is a real, separate cost that varies by panel, wiring, and local labor rates, not something this page's per-mile math includes.

Line up a few South Dakota electrician quotes for Level 2 install before you commit either way.

Where these figures come from

See the methodology guide for exactly which EIA and EPA figures feed 2026 Rivian R1S Dual Large Plus (22in)'s cost in South Dakota. South Dakota's 14.33¢/kWh rate ranks 14 of 51 states; the state rate guide lays out the full spread.