Charging a 2026 Rivian R1S Tri Max (22in) at home in Oregon

A 2026 Rivian R1S Tri Max (22in) draws 44.6 kWh per 100 miles per the EPA; at Oregon's 15.31¢/kWh residential rate that's $6.82 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. That works out to 57.4% cheaper per mile than gasoline in Oregon — charging at home is much cheaper than gas here.

What a year of driving costs

Oregon owners putting 15,000 annual miles on a 2026 Rivian R1S Tri Max (22in) spend about $1,024 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,379 saved annually, at this mileage.

Cost of a full charge

At Oregon's rate, fully covering this 2026 Rivian R1S Tri Max (22in)'s 371-mile EPA range costs about $25.32 (165.4 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 Tri Max (22in) in Oregon ranks 12,562 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Tri Max (22in) ranks 356 of 400 EV models for raw efficiency, and Oregon ranks 21 of 51 for cheapest residential electricity.

Before you install a home charger in Oregon

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.

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

More on how this number was built

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. Oregon's 15.31¢/kWh rate ranks 21 of 51 states; the state rate guide lays out the full spread.