2026 Rivian R1T All-Terrain Tri Max (20in): home charging cost in Washington

A 2026 Rivian R1T All-Terrain Tri Max (20in) draws 49.8 kWh per 100 miles per the EPA; at Washington's 14.35¢/kWh residential rate that's $7.15 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: 55.4% 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 All-Terrain Tri Max (20in) charged at home in Washington costs about $1,073/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,330 a year.

Cost of a full charge

A 2026 Rivian R1T All-Terrain Tri Max (20in) needs roughly 164 kWh to reach its EPA-rated 329-mile range, which runs about $23.53 at 14.35¢/kWh in Washington.

2026 Rivian R1T All-Terrain Tri Max (20in) in Washington, ranked

This combination ranks 13,428 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1T All-Terrain Tri Max (20in) alone ranks 389 of 400 models for efficiency; Washington alone ranks 15 of 51 states for electricity price.

Next step: home charger installation

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.

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

Where these figures come from

See the methodology guide for exactly which EIA and EPA figures feed 2026 Rivian R1T All-Terrain Tri Max (20in)'s cost in Washington. At 14.35¢/kWh, Washington sits in the middle of the national range — the guide to why charging cost varies by state shows where.