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

In Colorado, home electricity runs 16.65¢/kWh — put a 2027 Rivian R1S Premium (20in AT)'s EPA-rated 44.4 kWh/100mi against that and 100 miles costs $7.39, versus $16.02 for a gas car averaging 25.5 mpg. That works out to 53.9% 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 AT) spend about $1,108 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,295 saved annually, at this mileage.

What one full charge costs

At Colorado's rate, fully covering this 2027 Rivian R1S Premium (20in AT)'s 289-mile EPA range costs about $21.35 (128.2 kWh) — the energy the EPA test actually used, not the battery's rated size.

How this compares nationally

Among all 20,400 state-and-model combinations this site tracks, charging a 2027 Rivian R1S Premium (20in AT) in Colorado ranks 13,952 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Premium (20in AT) ranks 342 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

The methodology guide names the exact EIA and EPA tables behind this page's numbers. At 16.65¢/kWh, Colorado sits in the middle of the national range — the guide to why charging cost varies by state shows where.