2026 Rivian R1S Performance Dual Large (22in): home charging cost in Washington

In Washington, home electricity runs 14.35¢/kWh — put a 2026 Rivian R1S Performance Dual Large (22in)'s EPA-rated 39.5 kWh/100mi against that and 100 miles costs $5.66, versus $16.02 for a gas car averaging 25.5 mpg. Charging at home is much cheaper than gas here: 64.6% less than gas per mile, here specifically.

What a year of driving costs

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2026 Rivian R1S Performance Dual Large (22in) charged at home in Washington costs about $850/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,553 a year.

Filling up the 2026 Rivian R1S Performance Dual Large (22in), in dollars

A 2026 Rivian R1S Performance Dual Large (22in) needs roughly 129.9 kWh to reach its EPA-rated 329-mile range, which runs about $18.64 at 14.35¢/kWh in Washington.

2026 Rivian R1S Performance Dual Large (22in) in Washington, ranked

This combination ranks 7,859 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Performance Dual Large (22in) alone ranks 251 of 400 models for efficiency; Washington alone ranks 15 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 Washington 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 2026 Rivian R1S Performance Dual Large (22in)'s cost in Washington. Curious how Washington's 14.35¢/kWh compares? The guide to charging cost by state ranks every state side by side.