2026 Rivian R1S Dual Standard (20in): home charging cost in Illinois

In Illinois, home electricity runs 19.22¢/kWh — put a 2026 Rivian R1S Dual Standard (20in)'s EPA-rated 42.9 kWh/100mi against that and 100 miles costs $8.24, versus $16.02 for a gas car averaging 25.5 mpg. Charging at home is much cheaper than gas here: 48.6% 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 Standard (20in) charged at home in Illinois costs about $1,236/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,167 a year.

What one full charge costs

A 2026 Rivian R1S Dual Standard (20in) needs roughly 110.6 kWh to reach its EPA-rated 258-mile range, which runs about $21.26 at 19.22¢/kWh in Illinois.

Where this ranks

This combination ranks 15,395 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Dual Standard (20in) alone ranks 312 of 400 models for efficiency; Illinois alone ranks 36 of 51 states for electricity price.

Before you install a home charger in Illinois

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.

Get quotes from local electricians for Level 2 charger installation in Illinois before deciding.

Where these figures come from

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. Illinois's 19.22¢/kWh rate ranks 36 of 51 states; the state rate guide lays out the full spread.