Charging a 2027 Rivian R1S Premium Long Range (22in) at home in California

At California's residential electricity rate of 33.17¢/kWh, a 2027 Rivian R1S Premium Long Range (22in) (rated 39.9 kWh per 100 miles by the EPA) costs $13.25 to drive 100 miles on home charging, against $16.02 for the same distance in a car averaging 25.5 mpg on gasoline at $4.085/gallon. That works out to 17.3% cheaper per mile than gasoline in California — charging at home is cheaper than gas here.

2027 Rivian R1S Premium Long Range (22in): yearly cost in California

California owners putting 15,000 annual miles on a 2027 Rivian R1S Premium Long Range (22in) spend about $1,987 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $416 saved annually, at this mileage.

What one full charge costs

At California's rate, fully covering this 2027 Rivian R1S Premium Long Range (22in)'s 410-mile EPA range costs about $54.32 (163.7 kWh) — the energy the EPA test actually used, not the battery's rated size.

2027 Rivian R1S Premium Long Range (22in) in California, ranked

Among all 20,400 state-and-model combinations this site tracks, charging a 2027 Rivian R1S Premium Long Range (22in) in California ranks 19,619 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Premium Long Range (22in) ranks 264 of 400 EV models for raw efficiency, and California ranks 50 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.

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

More on how this number was built

The methodology guide names the exact EIA and EPA tables behind this page's numbers. California has some of the highest residential electricity rates in the country — see the guide to why the cost varies so much by state for the full picture.