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

In Iowa, home electricity runs 13.77¢/kWh — put a 2026 Rivian R1S Quad Max (22in)'s EPA-rated 44.4 kWh/100mi against that and 100 miles costs $6.11, versus $16.02 for a gas car averaging 25.5 mpg. That works out to 61.9% cheaper per mile than gasoline in Iowa — charging at home is much cheaper than gas here.

What a year of driving costs

Iowa owners putting 15,000 annual miles on a 2026 Rivian R1S Quad Max (22in) spend about $916 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,486 saved annually, at this mileage.

What one full charge costs

At Iowa's rate, fully covering this 2026 Rivian R1S Quad Max (22in)'s 374-mile EPA range costs about $22.85 (166 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 Quad Max (22in) in Iowa ranks 9,883 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Quad Max (22in) ranks 350 of 400 EV models for raw efficiency, and Iowa ranks 9 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.

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

More on how this number was built

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. At 13.77¢/kWh, Iowa sits in the middle of the national range — the guide to why charging cost varies by state shows where.