What it costs to charge a 2026 Rivian R1T Performance Dual Large (20in) in South Dakota

In South Dakota, home electricity runs 14.33¢/kWh — put a 2026 Rivian R1T Performance Dual Large (20in)'s EPA-rated 42.9 kWh/100mi against that and 100 miles costs $6.14, versus $16.02 for a gas car averaging 25.5 mpg. That works out to 61.7% cheaper per mile than gasoline in South Dakota — charging at home is much cheaper than gas here.

Annual cost, at 15 thousands miles a year

Home charging this 2026 Rivian R1T Performance Dual Large (20in) in South Dakota runs about $922 over fueleconomy.gov's default 15,000 annual miles, versus about $2,403 for the gasoline equivalent. Call it about $1,481 saved annually, at this mileage.

Filling up the 2026 Rivian R1T Performance Dual Large (20in), in dollars

$18.43 — that's what South Dakota's 14.33¢/kWh rate puts on the 128.6 kWh a 2026 Rivian R1T Performance Dual Large (20in) needs for its full 300-mile EPA range.

How this compares nationally

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1T Performance Dual Large (20in) in South Dakota ranks 10,077 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1T Performance Dual Large (20in) ranks 319 of 400 EV models for raw efficiency, and South Dakota ranks 14 of 51 for cheapest residential electricity.

Before you install a home charger in South Dakota

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

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. At 14.33¢/kWh, South Dakota sits in the middle of the national range — the guide to why charging cost varies by state shows where.