Charging a 2026 Rivian R1S Tri Max (22in) at home in Iowa

At Iowa's residential electricity rate of 13.77¢/kWh, a 2026 Rivian R1S Tri Max (22in) (rated 44.6 kWh per 100 miles by the EPA) costs $6.14 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 61.7% cheaper per mile than gasoline in Iowa — charging at home is much cheaper than gas here.

2026 Rivian R1S Tri Max (22in): yearly cost in Iowa

Iowa owners putting 15,000 annual miles on a 2026 Rivian R1S Tri Max (22in) spend about $921 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,482 saved annually, at this mileage.

Filling up the 2026 Rivian R1S Tri Max (22in), in dollars

At Iowa's rate, fully covering this 2026 Rivian R1S Tri Max (22in)'s 371-mile EPA range costs about $22.77 (165.4 kWh) — the energy the EPA test actually used, not the battery's rated size.

Where this ranks

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1S Tri Max (22in) in Iowa ranks 10,036 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Tri Max (22in) ranks 356 of 400 EV models for raw efficiency, and Iowa ranks 9 of 51 for cheapest residential electricity.

Getting set up to charge a 2026 Rivian R1S Tri Max (22in) at home

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.

Ask a licensed Iowa electrician to quote the install before this math becomes a real decision.

More on how this number was built

See the methodology guide for exactly which EIA and EPA figures feed 2026 Rivian R1S Tri Max (22in)'s cost in Iowa. Iowa's 13.77¢/kWh rate ranks 9 of 51 states; the state rate guide lays out the full spread.