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

In Mississippi, home electricity runs 15.35¢/kWh — put a 2026 Rivian R1S All-Terrain Dual Max (20in)'s EPA-rated 43.2 kWh/100mi against that and 100 miles costs $6.64, versus $16.02 for a gas car averaging 25.5 mpg. That works out to 58.6% 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 Dual Max (20in) spend about $995 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,408 saved annually, at this mileage.

What one full charge costs

At Mississippi's rate, fully covering this 2026 Rivian R1S All-Terrain Dual Max (20in)'s 370-mile EPA range costs about $24.55 (159.9 kWh) — the energy the EPA test actually used, not the battery's rated size.

How this compares nationally

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1S All-Terrain Dual Max (20in) in Mississippi ranks 11,964 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S All-Terrain Dual Max (20in) ranks 333 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.

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

More on how this number was built

The methodology guide names the exact EIA and EPA tables behind this page's numbers. At 15.35¢/kWh, Mississippi sits in the middle of the national range — the guide to why charging cost varies by state shows where.