Mississippi home charging cost for the 2026 Rivian R1S Dual Large (22in)

In Mississippi, home electricity runs 15.35¢/kWh — put a 2026 Rivian R1S Dual Large (22in)'s EPA-rated 39.5 kWh/100mi against that and 100 miles costs $6.06, versus $16.02 for a gas car averaging 25.5 mpg. Charging at home is much cheaper than gas here: 62.2% 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 Dual Large (22in) costs roughly $909 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 $1,494 a year.

Cost of a full charge

Covering the 2026 Rivian R1S Dual Large (22in)'s EPA-rated 329-mile range takes about 129.9 kWh, which costs about $19.93 at Mississippi's residential rate — figured from the EPA's own combined range and consumption numbers, not the pack's nameplate capacity.

How this compares nationally

This combination ranks 9,681 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Dual Large (22in) alone ranks 250 of 400 models for efficiency; Mississippi alone ranks 22 of 51 states for electricity price.

Getting set up to charge a 2026 Rivian R1S Dual Large (22in) 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.

Line up a few Mississippi electrician quotes for Level 2 install before you commit either way.

Where these figures come from

The methodology guide names the exact EIA and EPA tables behind this page's numbers. Mississippi's 15.35¢/kWh rate ranks 22 of 51 states; the state rate guide lays out the full spread.