South Dakota home charging cost for the 2027 Rivian R1S Premium (20in AT)

In South Dakota, home electricity runs 14.33¢/kWh — put a 2027 Rivian R1S Premium (20in AT)'s EPA-rated 44.4 kWh/100mi against that and 100 miles costs $6.36, versus $16.02 for a gas car averaging 25.5 mpg. Charging at home is much cheaper than gas here: 60.3% less than gas per mile, here specifically.

2027 Rivian R1S Premium (20in AT): yearly cost in South Dakota

At fueleconomy.gov's default of 15,000 annual miles, the 2027 Rivian R1S Premium (20in AT) costs roughly $954 a year to charge at home in South Dakota, against roughly $2,403 a year for an equivalent gas car. That's a savings of about $1,449 a year.

What one full charge costs

Covering the 2027 Rivian R1S Premium (20in AT)'s EPA-rated 289-mile range takes about 128.2 kWh, which costs about $18.37 at South Dakota's residential rate — figured from the EPA's own combined range and consumption numbers, not the pack's nameplate capacity.

2027 Rivian R1S Premium (20in AT) in South Dakota, ranked

This combination ranks 10,910 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Premium (20in AT) alone ranks 342 of 400 models for efficiency; South Dakota alone ranks 14 of 51 states for electricity price.

Before you install a home charger in South Dakota

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.

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

Where these figures come from

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. South Dakota's 14.33¢/kWh rate ranks 14 of 51 states; the state rate guide lays out the full spread.