California home charging cost for the 2026 Rivian R1S Performance Dual Large (20in)

In California, home electricity runs 33.17¢/kWh — put a 2026 Rivian R1S Performance Dual Large (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.

Annual cost, at 15 thousands miles a year

At fueleconomy.gov's default of 15,000 annual miles, the 2026 Rivian R1S Performance Dual Large (20in) costs roughly $2,133 a year to charge at home in California, against roughly $2,403 a year for an equivalent gas car. That's a savings of about $270 a year.

What one full charge costs

Covering the 2026 Rivian R1S Performance Dual Large (20in)'s EPA-rated 300-mile range takes about 128.6 kWh, which costs about $42.66 at California's residential rate — figured from the EPA's own combined range and consumption numbers, not the pack's nameplate capacity.

Where this ranks

This combination ranks 19,858 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Performance Dual Large (20in) alone ranks 317 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

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. 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.