Charging a 2027 Rivian R1T Quad (22in UHP) at home in South Dakota

At South Dakota's residential electricity rate of 14.33¢/kWh, a 2027 Rivian R1T Quad (22in UHP) (rated 47.3 kWh per 100 miles by the EPA) costs $6.78 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. That works out to 57.6% cheaper per mile than gasoline in South Dakota — charging at home is much cheaper than gas here.

What a year of driving costs

South Dakota owners putting 15,000 annual miles on a 2027 Rivian R1T Quad (22in UHP) spend about $1,018 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,385 saved annually, at this mileage.

Cost of a full charge

At South Dakota's rate, fully covering this 2027 Rivian R1T Quad (22in UHP)'s 338-mile EPA range costs about $22.93 (160 kWh) — the energy the EPA test actually used, not the battery's rated size.

2027 Rivian R1T Quad (22in UHP) in South Dakota, ranked

Among all 20,400 state-and-model combinations this site tracks, charging a 2027 Rivian R1T Quad (22in UHP) in South Dakota ranks 12,453 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1T Quad (22in UHP) ranks 372 of 400 EV models for raw efficiency, and South Dakota ranks 14 of 51 for cheapest residential electricity.

Next step: home charger installation

Everything above is the per-mile and per-year cost once a home charger exists — getting one installed is a separate electrical job whose price depends on your panel and wiring, not the state average used here.

Ask a licensed South Dakota electrician to quote the install before this math becomes a real decision.

More on how this number was built

The methodology guide names the exact EIA and EPA tables behind this page's numbers. South Dakota's 14.33¢/kWh rate ranks 14 of 51 states; the state rate guide lays out the full spread.