2026 Rivian R1S All-Terrain Performance Dual Large (20in): home charging cost in Washington

In Washington, home electricity runs 14.35¢/kWh — put a 2026 Rivian R1S All-Terrain Performance Dual Large (20in)'s EPA-rated 44.4 kWh/100mi against that and 100 miles costs $6.37, versus $16.02 for a gas car averaging 25.5 mpg. Charging at home is much cheaper than gas here: 60.3% less than gas per mile, here specifically.

2026 Rivian R1S All-Terrain Performance Dual Large (20in): yearly cost in Washington

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2026 Rivian R1S All-Terrain Performance Dual Large (20in) charged at home in Washington costs about $955/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,448 a year.

Cost of a full charge

A 2026 Rivian R1S All-Terrain Performance Dual Large (20in) needs roughly 128.2 kWh to reach its EPA-rated 289-mile range, which runs about $18.4 at 14.35¢/kWh in Washington.

Where this ranks

This combination ranks 10,934 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S All-Terrain Performance Dual Large (20in) alone ranks 345 of 400 models for efficiency; Washington alone ranks 15 of 51 states for electricity price.

Before you install a home charger in Washington

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.

Get quotes from local electricians for Level 2 charger installation in Washington before deciding.

Where these figures come from

See the methodology guide for exactly which EIA and EPA figures feed 2026 Rivian R1S All-Terrain Performance Dual Large (20in)'s cost in Washington. Washington's 14.35¢/kWh rate ranks 15 of 51 states; the state rate guide lays out the full spread.