2026 Rivian R1S Dual Max (20in): home charging cost in Iowa

In Iowa, home electricity runs 13.77¢/kWh — put a 2026 Rivian R1S Dual Max (20in)'s EPA-rated 42 kWh/100mi against that and 100 miles costs $5.78, versus $16.02 for a gas car averaging 25.5 mpg. Charging at home is much cheaper than gas here: 63.9% 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 Dual Max (20in) charged at home in Iowa costs about $867/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,536 a year.

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

A 2026 Rivian R1S Dual Max (20in) needs roughly 159.5 kWh to reach its EPA-rated 380-mile range, which runs about $21.96 at 13.77¢/kWh in Iowa.

2026 Rivian R1S Dual Max (20in) in Iowa, ranked

This combination ranks 8,376 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Dual Max (20in) alone ranks 298 of 400 models for efficiency; Iowa alone ranks 9 of 51 states for electricity price.

Next step: home charger installation

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 Iowa electrician quotes for Level 2 install before you commit either way.

Where these figures come from

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.