Charging a 2026 Rivian R1S Dual Large (22in) at home in Tennessee

At Tennessee's residential electricity rate of 13.9¢/kWh, a 2026 Rivian R1S Dual Large (22in) (rated 39.5 kWh per 100 miles by the EPA) costs $5.49 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. That works out to 65.8% cheaper per mile than gasoline in Tennessee — charging at home costs a fraction of what gas would here.

What a year of driving costs

Tennessee owners putting 15,000 annual miles on a 2026 Rivian R1S Dual Large (22in) spend about $823 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,580 saved annually, at this mileage.

Filling up the 2026 Rivian R1S Dual Large (22in), in dollars

At Tennessee's rate, fully covering this 2026 Rivian R1S Dual Large (22in)'s 329-mile EPA range costs about $18.05 (129.9 kWh) — the energy the EPA test actually used, not the battery's rated size.

How this compares nationally

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1S Dual Large (22in) in Tennessee ranks 6,880 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Dual Large (22in) ranks 250 of 400 EV models for raw efficiency, and Tennessee ranks 13 of 51 for cheapest residential electricity.

Next step: home charger installation

Everything above is the per-mile and per-year cost once a home charger exists — getting one installed is a separate electrical job whose price depends on your panel and wiring, not the state average used here.

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

More on how this number was built

The methodology guide names the exact EIA and EPA tables behind this page's numbers. Curious how Tennessee's 13.9¢/kWh compares? The guide to charging cost by state ranks every state side by side.