Iowa home charging cost for the 2026 Rivian R1S Dual Large Plus (22in)

At Iowa's residential electricity rate of 13.77¢/kWh, a 2026 Rivian R1S Dual Large Plus (22in) (rated 40.9 kWh per 100 miles by the EPA) costs $5.63 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. Charging at home is much cheaper than gas here: 64.8% less than gas per mile, here specifically.

Annual cost, at 15 thousands miles a year

At fueleconomy.gov's default of 15,000 annual miles, the 2026 Rivian R1S Dual Large Plus (22in) costs roughly $845 a year to charge at home in Iowa, against roughly $2,403 a year for an equivalent gas car. That's a savings of about $1,558 a year.

Cost of a full charge

Covering the 2026 Rivian R1S Dual Large Plus (22in)'s EPA-rated 330-mile range takes about 135 kWh, which costs about $18.59 at Iowa's residential rate — figured from the EPA's own combined range and consumption numbers, not the pack's nameplate capacity.

How this compares nationally

This combination ranks 7,601 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Dual Large Plus (22in) alone ranks 278 of 400 models for efficiency; Iowa alone ranks 9 of 51 states for electricity price.

Before you install a home charger in Iowa

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.

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

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.