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

At California's residential electricity rate of 33.17¢/kWh, a 2026 Rivian R1S Dual Large Plus (20in) (rated 43.1 kWh per 100 miles by the EPA) costs $14.3 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. Charging at home costs a little less than gas here: 10.7% 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 Dual Large Plus (20in) costs roughly $2,146 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 $257 a year.

Cost of a full charge

Covering the 2026 Rivian R1S Dual Large Plus (20in)'s EPA-rated 317-mile range takes about 136.7 kWh, which costs about $45.34 at California's residential rate — figured from the EPA's own combined range and consumption numbers, not the pack's nameplate capacity.

How this compares nationally

This combination ranks 19,886 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Dual Large Plus (20in) alone ranks 327 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.

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

Where these figures come from

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.