2026 Rivian R1S Performance Dual Max (20in): home charging cost in Mississippi

At Mississippi's residential electricity rate of 15.35¢/kWh, a 2026 Rivian R1S 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. Charging at home is much cheaper than gas here: 59.8% less than gas per mile, here specifically.

Annual cost, at 15 thousands miles a year

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2026 Rivian R1S Performance Dual Max (20in) charged at home in Mississippi costs about $966/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,437 a year.

What one full charge costs

A 2026 Rivian R1S Performance Dual Max (20in) needs roughly 159.5 kWh to reach its EPA-rated 380-mile range, which runs about $24.48 at 15.35¢/kWh in Mississippi.

Where this ranks

This combination ranks 11,255 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Performance Dual Max (20in) alone ranks 299 of 400 models for efficiency; Mississippi alone ranks 22 of 51 states for electricity price.

Getting set up to charge a 2026 Rivian R1S Performance Dual Max (20in) at home

The numbers above assume Level 2 home charging is already in place — the electrical work behind that is a real, separate cost that varies by panel, wiring, and local labor rates, not something this page's per-mile math includes.

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

Where these figures come from

See the methodology guide for exactly which EIA and EPA figures feed 2026 Rivian R1S Performance Dual Max (20in)'s cost in Mississippi. At 15.35¢/kWh, Mississippi sits in the middle of the national range — the guide to why charging cost varies by state shows where.