What it costs to charge a 2026 Rivian R1S Dual Large (22in) in Washington

At Washington's residential electricity rate of 14.35¢/kWh, a 2026 Rivian R1S Dual Large (22in) (rated 39.5 kWh per 100 miles by the EPA) costs $5.66 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. That works out to 64.6% cheaper per mile than gasoline in Washington — charging at home is much cheaper than gas here.

2026 Rivian R1S Dual Large (22in): yearly cost in Washington

Home charging this 2026 Rivian R1S Dual Large (22in) in Washington runs about $850 over fueleconomy.gov's default 15,000 annual miles, versus about $2,403 for the gasoline equivalent. Call it about $1,553 saved annually, at this mileage.

Cost of a full charge

$18.64 — that's what Washington's 14.35¢/kWh rate puts on the 129.9 kWh a 2026 Rivian R1S Dual Large (22in) needs for its full 329-mile EPA range.

Where this ranks

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1S Dual Large (22in) in Washington ranks 7,858 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Dual Large (22in) ranks 250 of 400 EV models for raw efficiency, and Washington ranks 15 of 51 for cheapest residential electricity.

Getting set up to charge a 2026 Rivian R1S Dual Large (22in) at home

Everything above is the per-mile and per-year cost once a home charger exists — getting one installed is a separate electrical job whose price depends on your panel and wiring, not the state average used here.

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

More on how this number was built

See the methodology guide for exactly which EIA and EPA figures feed 2026 Rivian R1S Dual Large (22in)'s cost in Washington. At 14.35¢/kWh, Washington sits in the middle of the national range — the guide to why charging cost varies by state shows where.