2026 Rivian R1T Tri Max (22in): home charging cost in Washington

In Washington, home electricity runs 14.35¢/kWh — put a 2026 Rivian R1T Tri Max (22in)'s EPA-rated 44.6 kWh/100mi against that and 100 miles costs $6.4, versus $16.02 for a gas car averaging 25.5 mpg. Charging at home is much cheaper than gas here: 60.1% less than gas per mile, here specifically.

What a year of driving costs

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2026 Rivian R1T Tri Max (22in) charged at home in Washington costs about $959/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,444 a year.

Cost of a full charge

A 2026 Rivian R1T Tri Max (22in) needs roughly 165.4 kWh to reach its EPA-rated 371-mile range, which runs about $23.73 at 14.35¢/kWh in Washington.

How this compares nationally

This combination ranks 11,099 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1T Tri Max (22in) alone ranks 357 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.

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

Where these figures come from

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. At 14.35¢/kWh, Washington sits in the middle of the national range — the guide to why charging cost varies by state shows where.