Mississippi home charging cost for the 2026 Rivian R1S All-Terrain Performance Dual Max (20in)

At Mississippi's residential electricity rate of 15.35¢/kWh, a 2026 Rivian R1S All-Terrain Performance Dual Max (20in) (rated 43.2 kWh per 100 miles by the EPA) costs $6.64 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: 58.6% less than gas per mile, here specifically.

What a year of driving costs

At fueleconomy.gov's default of 15,000 annual miles, the 2026 Rivian R1S All-Terrain Performance Dual Max (20in) costs roughly $995 a year to charge at home in Mississippi, against roughly $2,403 a year for an equivalent gas car. That's a savings of about $1,408 a year.

Filling up the 2026 Rivian R1S All-Terrain Performance Dual Max (20in), in dollars

Covering the 2026 Rivian R1S All-Terrain Performance Dual Max (20in)'s EPA-rated 370-mile range takes about 159.9 kWh, which costs about $24.55 at Mississippi's residential rate — figured from the EPA's own combined range and consumption numbers, not the pack's nameplate capacity.

Where this ranks

This combination ranks 11,965 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S All-Terrain Performance Dual Max (20in) alone ranks 334 of 400 models for efficiency; Mississippi alone ranks 22 of 51 states for electricity price.

Before you install a home charger in Mississippi

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 All-Terrain Performance Dual Max (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.