Charging a 2027 Rivian R1S Premium (20in) at home in Colorado

In Colorado, home electricity runs 16.65¢/kWh — put a 2027 Rivian R1S Premium (20in)'s EPA-rated 42.9 kWh/100mi against that and 100 miles costs $7.14, versus $16.02 for a gas car averaging 25.5 mpg. That works out to 55.4% cheaper per mile than gasoline in Colorado — charging at home is much cheaper than gas here.

Annual cost, at 15 thousands miles a year

Colorado owners putting 15,000 annual miles on a 2027 Rivian R1S Premium (20in) spend about $1,071 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,332 saved annually, at this mileage.

Filling up the 2027 Rivian R1S Premium (20in), in dollars

At Colorado's rate, fully covering this 2027 Rivian R1S Premium (20in)'s 300-mile EPA range costs about $21.41 (128.6 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 Premium (20in) in Colorado ranks 13,375 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Premium (20in) ranks 314 of 400 EV models for raw efficiency, and Colorado ranks 30 of 51 for cheapest residential electricity.

Next step: home charger installation

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 Colorado 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 Premium (20in)'s cost in Colorado. Curious how Colorado's 16.65¢/kWh compares? The guide to charging cost by state ranks every state side by side.