Charging a 2026 Rivian R1S All-Terrain Performance Dual Large Plus (20in) at home in Washington

In Washington, home electricity runs 14.35¢/kWh — put a 2026 Rivian R1S All-Terrain Performance Dual Large Plus (20in)'s EPA-rated 46.9 kWh/100mi against that and 100 miles costs $6.73, versus $16.02 for a gas car averaging 25.5 mpg. That works out to 58% cheaper per mile than gasoline in Washington — charging at home is much cheaper than gas here.

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

Washington owners putting 15,000 annual miles on a 2026 Rivian R1S All-Terrain Performance Dual Large Plus (20in) spend about $1,009 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,394 saved annually, at this mileage.

Filling up the 2026 Rivian R1S All-Terrain Performance Dual Large Plus (20in), in dollars

At Washington's rate, fully covering this 2026 Rivian R1S All-Terrain Performance Dual Large Plus (20in)'s 292-mile EPA range costs about $19.65 (136.9 kWh) — the energy the EPA test actually used, not the battery's rated size.

Where this ranks

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1S All-Terrain Performance Dual Large Plus (20in) in Washington ranks 12,260 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S All-Terrain Performance Dual Large Plus (20in) ranks 366 of 400 EV models for raw efficiency, and Washington ranks 15 of 51 for cheapest residential electricity.

Next step: home charger installation

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.

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

More on how this number was built

See the methodology guide for exactly which EIA and EPA figures feed 2026 Rivian R1S All-Terrain Performance Dual Large Plus (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.