Charging a 2026 Rivian R1T Performance Dual Max (20in) at home in Mississippi
At Mississippi's residential electricity rate of 15.35¢/kWh, a 2026 Rivian R1T Performance Dual Max (20in) (rated 42 kWh per 100 miles by the EPA) costs $6.44 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 59.8% 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 R1T Performance Dual Max (20in) spend about $966 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,437 saved annually, at this mileage.
Cost of a full charge
At Mississippi's rate, fully covering this 2026 Rivian R1T Performance Dual Max (20in)'s 380-mile EPA range costs about $24.48 (159.5 kWh) — the energy the EPA test actually used, not the battery's rated size.
2026 Rivian R1T Performance Dual Max (20in) in Mississippi, ranked
Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1T Performance Dual Max (20in) in Mississippi ranks 11,257 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1T Performance Dual Max (20in) ranks 301 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.
Ask a licensed Mississippi electrician to quote the install before this math becomes a real decision.
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.