2027 Rivian R1S Premium (20in AT): home charging cost in Iowa

In Iowa, home electricity runs 13.77¢/kWh — put a 2027 Rivian R1S Premium (20in AT)'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. Charging at home is much cheaper than gas here: 61.9% less than gas per mile, here specifically.

Annual cost, at 15 thousands miles a year

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2027 Rivian R1S Premium (20in AT) charged at home in Iowa costs about $916/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,487 a year.

What one full charge costs

A 2027 Rivian R1S Premium (20in AT) needs roughly 128.2 kWh to reach its EPA-rated 289-mile range, which runs about $17.65 at 13.77¢/kWh in Iowa.

Where this ranks

This combination ranks 9,876 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Premium (20in AT) alone ranks 342 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

The methodology guide names the exact EIA and EPA tables behind this page's numbers. At 13.77¢/kWh, Iowa sits in the middle of the national range — the guide to why charging cost varies by state shows where.