What it costs to charge a 2027 Rivian R1S Premium (20in) in Mississippi

At Mississippi's residential electricity rate of 15.35¢/kWh, a 2027 Rivian R1S Premium (20in) (rated 42.9 kWh per 100 miles by the EPA) costs $6.58 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 58.9% cheaper per mile than gasoline in Mississippi — charging at home is much cheaper than gas here.

Annual cost, at 15 thousands miles a year

Home charging this 2027 Rivian R1S Premium (20in) in Mississippi runs about $987 over fueleconomy.gov's default 15,000 annual miles, versus about $2,403 for the gasoline equivalent. Call it about $1,416 saved annually, at this mileage.

What one full charge costs

$19.74 — that's what Mississippi's 15.35¢/kWh rate puts on the 128.6 kWh a 2027 Rivian R1S Premium (20in) needs for its full 300-mile EPA range.

Where this ranks

Among all 20,400 state-and-model combinations this site tracks, charging a 2027 Rivian R1S Premium (20in) in Mississippi ranks 11,753 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Premium (20in) ranks 314 of 400 EV models for raw efficiency, and Mississippi ranks 22 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.

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

More on how this number was built

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. Mississippi's 15.35¢/kWh rate ranks 22 of 51 states; the state rate guide lays out the full spread.