2027 Rivian R1S Premium (20in): home charging cost in California

In California, home electricity runs 33.17¢/kWh — put a 2027 Rivian R1S Premium (20in)'s EPA-rated 42.9 kWh/100mi against that and 100 miles costs $14.22, versus $16.02 for a gas car averaging 25.5 mpg. Charging at home costs a little less than gas here: 11.2% less than gas per mile, here specifically.

2027 Rivian R1S Premium (20in): yearly cost in California

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2027 Rivian R1S Premium (20in) charged at home in California costs about $2,133/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $270 a year.

Cost of a full charge

A 2027 Rivian R1S Premium (20in) needs roughly 128.6 kWh to reach its EPA-rated 300-mile range, which runs about $42.66 at 33.17¢/kWh in California.

2027 Rivian R1S Premium (20in) in California, ranked

This combination ranks 19,854 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Premium (20in) alone ranks 314 of 400 models for efficiency; California alone ranks 50 of 51 states for electricity price.

Next step: home charger installation

The numbers above assume Level 2 home charging is already in place — the electrical work behind that is a real, separate cost that varies by panel, wiring, and local labor rates, not something this page's per-mile math includes.

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

Where these figures come from

See the methodology guide for exactly which EIA and EPA figures feed 2027 Rivian R1S Premium (20in)'s cost in California. 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.