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

In Mississippi, home electricity runs 15.35¢/kWh — put a 2026 Rivian R1S Dual Standard (20in)'s EPA-rated 42.9 kWh/100mi against that and 100 miles costs $6.58, versus $16.02 for a gas car averaging 25.5 mpg. Charging at home is much cheaper than gas here: 58.9% 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 Dual Standard (20in) charged at home in Mississippi costs about $987/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,416 a year.

Cost of a full charge

A 2026 Rivian R1S Dual Standard (20in) needs roughly 110.6 kWh to reach its EPA-rated 258-mile range, which runs about $16.98 at 15.35¢/kWh in Mississippi.

Where this ranks

This combination ranks 11,756 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Dual Standard (20in) alone ranks 312 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.

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

Where these figures come from

See the methodology guide for exactly which EIA and EPA figures feed 2026 Rivian R1S Dual Standard (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.