Charging a 2027 Rivian R1S Performance (20in AT) at home in Washington

In Washington, home electricity runs 14.35¢/kWh — put a 2027 Rivian R1S Performance (20in AT)'s EPA-rated 49.8 kWh/100mi against that and 100 miles costs $7.15, versus $16.02 for a gas car averaging 25.5 mpg. That works out to 55.4% 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 2027 Rivian R1S Performance (20in AT) spend about $1,073 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,330 saved annually, at this mileage.

Filling up the 2027 Rivian R1S Performance (20in AT), in dollars

At Washington's rate, fully covering this 2027 Rivian R1S Performance (20in AT)'s 329-mile EPA range costs about $23.53 (164 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 2027 Rivian R1S Performance (20in AT) in Washington ranks 13,424 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Performance (20in AT) ranks 386 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.

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 2027 Rivian R1S Performance (20in AT)'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.