Charging a 2026 Rivian R1S Performance Dual Max (20in) at home in Washington

In Washington, home electricity runs 14.35¢/kWh — put a 2026 Rivian R1S Performance Dual Max (20in)'s EPA-rated 42 kWh/100mi against that and 100 miles costs $6.02, versus $16.02 for a gas car averaging 25.5 mpg. That works out to 62.4% cheaper per mile than gasoline in Washington — charging at home is much cheaper than gas here.

Annual cost, at 15 thousands miles a year

Washington owners putting 15,000 annual miles on a 2026 Rivian R1S Performance Dual Max (20in) spend about $903 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,499 saved annually, at this mileage.

Filling up the 2026 Rivian R1S Performance Dual Max (20in), in dollars

At Washington's rate, fully covering this 2026 Rivian R1S Performance Dual Max (20in)'s 380-mile EPA range costs about $22.89 (159.5 kWh) — the energy the EPA test actually used, not the battery's rated size.

How this compares nationally

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1S Performance Dual Max (20in) in Washington ranks 9,569 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Performance Dual Max (20in) ranks 299 of 400 EV models for raw efficiency, and Washington ranks 15 of 51 for cheapest residential electricity.

Before you install a home charger in Washington

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.

Line up a few Washington electrician quotes for Level 2 install before you commit either way.

More on how this number was built

See the methodology guide for exactly which EIA and EPA figures feed 2026 Rivian R1S Performance Dual Max (20in)'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.