Charging a 2027 Rivian R1S Quad (20in AT) at home in Illinois

In Illinois, home electricity runs 19.22¢/kWh — put a 2027 Rivian R1S Quad (20in AT)'s EPA-rated 50.1 kWh/100mi against that and 100 miles costs $9.63, versus $16.02 for a gas car averaging 25.5 mpg. That works out to 39.9% cheaper per mile than gasoline in Illinois — charging at home is cheaper than gas here.

What a year of driving costs

Illinois owners putting 15,000 annual miles on a 2027 Rivian R1S Quad (20in AT) spend about $1,444 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $958 saved annually, at this mileage.

What one full charge costs

At Illinois's rate, fully covering this 2027 Rivian R1S Quad (20in AT)'s 325-mile EPA range costs about $31.3 (162.8 kWh) — the energy the EPA test actually used, not the battery's rated size.

Where this ranks

Among all 20,400 state-and-model combinations this site tracks, charging a 2027 Rivian R1S Quad (20in AT) in Illinois ranks 17,087 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Quad (20in AT) ranks 390 of 400 EV models for raw efficiency, and Illinois ranks 36 of 51 for cheapest residential electricity.

Before you install a home charger in Illinois

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.

Line up a few Illinois electrician quotes for Level 2 install before you commit either way.

More on how this number was built

See the methodology guide for exactly which EIA and EPA figures feed 2027 Rivian R1S Quad (20in AT)'s cost in Illinois. At 19.22¢/kWh, Illinois sits in the middle of the national range — the guide to why charging cost varies by state shows where.