Charging a 2026 Rivian R1S All-Terrain Performance Dual Large (20in) at home in Mississippi

At Mississippi's residential electricity rate of 15.35¢/kWh, a 2026 Rivian R1S All-Terrain Performance Dual Large (20in) (rated 44.4 kWh per 100 miles by the EPA) costs $6.81 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 57.5% 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 2026 Rivian R1S All-Terrain Performance Dual Large (20in) spend about $1,021 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,382 saved annually, at this mileage.

Cost of a full charge

At Mississippi's rate, fully covering this 2026 Rivian R1S All-Terrain Performance Dual Large (20in)'s 289-mile EPA range costs about $19.68 (128.2 kWh) — the energy the EPA test actually used, not the battery's rated size.

2026 Rivian R1S All-Terrain Performance Dual Large (20in) in Mississippi, ranked

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1S All-Terrain Performance Dual Large (20in) in Mississippi ranks 12,505 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S All-Terrain Performance Dual Large (20in) ranks 345 of 400 EV models for raw efficiency, and Mississippi ranks 22 of 51 for cheapest residential electricity.

Before you install a home charger in Mississippi

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.

Get quotes from local electricians for Level 2 charger installation in Mississippi before deciding.

More on how this number was built

See the methodology guide for exactly which EIA and EPA figures feed 2026 Rivian R1S All-Terrain Performance Dual Large (20in)'s cost in Mississippi. Curious how Mississippi's 15.35¢/kWh compares? The guide to charging cost by state ranks every state side by side.