2026 Rivian R1S Dual Large Plus (22in): home charging cost in Washington

A 2026 Rivian R1S Dual Large Plus (22in) draws 40.9 kWh per 100 miles per the EPA; at Washington's 14.35¢/kWh residential rate that's $5.87 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. Charging at home is much cheaper than gas here: 63.4% less than gas per mile, here specifically.

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

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2026 Rivian R1S Dual Large Plus (22in) charged at home in Washington costs about $880/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,523 a year.

Cost of a full charge

A 2026 Rivian R1S Dual Large Plus (22in) needs roughly 135 kWh to reach its EPA-rated 330-mile range, which runs about $19.37 at 14.35¢/kWh in Washington.

Where this ranks

This combination ranks 8,791 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Dual Large Plus (22in) alone ranks 278 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.

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

Where these figures come from

The methodology guide names the exact EIA and EPA tables behind this page's numbers. At 14.35¢/kWh, Washington sits in the middle of the national range — the guide to why charging cost varies by state shows where.