2026 Rivian R1S Performance Dual Large (20in): home charging cost in Tennessee

A 2026 Rivian R1S Performance Dual Large (20in) draws 42.9 kWh per 100 miles per the EPA; at Tennessee's 13.9¢/kWh residential rate that's $5.96 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. Charging at home is much cheaper than gas here: 62.8% less than gas per mile, here specifically.

What a year of driving costs

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2026 Rivian R1S Performance Dual Large (20in) charged at home in Tennessee costs about $894/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,509 a year.

Filling up the 2026 Rivian R1S Performance Dual Large (20in), in dollars

A 2026 Rivian R1S Performance Dual Large (20in) needs roughly 128.6 kWh to reach its EPA-rated 300-mile range, which runs about $17.88 at 13.9¢/kWh in Tennessee.

Where this ranks

This combination ranks 9,263 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Performance Dual Large (20in) alone ranks 317 of 400 models for efficiency; Tennessee alone ranks 13 of 51 states for electricity price.

Getting set up to charge a 2026 Rivian R1S Performance Dual Large (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.

Line up a few Tennessee 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 Performance Dual Large (20in)'s cost in Tennessee. Tennessee's 13.9¢/kWh rate ranks 13 of 51 states; the state rate guide lays out the full spread.