Charging a 2027 Rivian R1S Quad (20in AT) at home in Mississippi

A 2027 Rivian R1S Quad (20in AT) draws 50.1 kWh per 100 miles per the EPA; at Mississippi's 15.35¢/kWh residential rate that's $7.69 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. That works out to 52% cheaper per mile than gasoline in Mississippi — charging at home is much cheaper than gas here.

What a year of driving costs

Mississippi owners putting 15,000 annual miles on a 2027 Rivian R1S Quad (20in AT) spend about $1,154 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,249 saved annually, at this mileage.

Cost of a full charge

At Mississippi's rate, fully covering this 2027 Rivian R1S Quad (20in AT)'s 325-mile EPA range costs about $24.99 (162.8 kWh) — the energy the EPA test actually used, not the battery's rated size.

Where this ranks

Among all 20,400 state-and-model combinations this site tracks, charging a 2027 Rivian R1S Quad (20in AT) in Mississippi ranks 14,548 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Quad (20in AT) ranks 390 of 400 EV models for raw efficiency, and Mississippi ranks 22 of 51 for cheapest residential electricity.

Getting set up to charge a 2027 Rivian R1S Quad (20in AT) 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.

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.