Charging a 2027 Rivian R1S Quad (22in UHP) at home in Illinois

In Illinois, home electricity runs 19.22¢/kWh — put a 2027 Rivian R1S Quad (22in UHP)'s EPA-rated 47.3 kWh/100mi against that and 100 miles costs $9.1, versus $16.02 for a gas car averaging 25.5 mpg. That works out to 43.2% cheaper per mile than gasoline in Illinois — charging at home is much cheaper than gas here.

2027 Rivian R1S Quad (22in UHP): yearly cost in Illinois

Illinois owners putting 15,000 annual miles on a 2027 Rivian R1S Quad (22in UHP) spend about $1,365 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,038 saved annually, at this mileage.

What one full charge costs

At Illinois's rate, fully covering this 2027 Rivian R1S Quad (22in UHP)'s 338-mile EPA range costs about $30.76 (160 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 (22in UHP) in Illinois ranks 16,496 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Quad (22in UHP) ranks 371 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.

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

More on how this number was built

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.