What it costs to charge a 2026 Rivian R1S All-Terrain Tri Max (20in) in South Dakota

In South Dakota, home electricity runs 14.33¢/kWh — put a 2026 Rivian R1S All-Terrain Tri Max (20in)'s EPA-rated 49.8 kWh/100mi against that and 100 miles costs $7.14, versus $16.02 for a gas car averaging 25.5 mpg. That works out to 55.4% cheaper per mile than gasoline in South Dakota — charging at home is much cheaper than gas here.

What a year of driving costs

Home charging this 2026 Rivian R1S All-Terrain Tri Max (20in) in South Dakota runs about $1,071 over fueleconomy.gov's default 15,000 annual miles, versus about $2,403 for the gasoline equivalent. Call it about $1,332 saved annually, at this mileage.

Filling up the 2026 Rivian R1S All-Terrain Tri Max (20in), in dollars

$23.49 — that's what South Dakota's 14.33¢/kWh rate puts on the 164 kWh a 2026 Rivian R1S All-Terrain Tri Max (20in) needs for its full 329-mile EPA range.

How this compares nationally

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1S All-Terrain Tri Max (20in) in South Dakota ranks 13,409 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S All-Terrain Tri Max (20in) ranks 388 of 400 EV models for raw efficiency, and South Dakota ranks 14 of 51 for cheapest residential electricity.

Getting set up to charge a 2026 Rivian R1S All-Terrain Tri Max (20in) at home

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.