Colorado home charging cost for the 2026 Rivian R1S Tri Max (22in)

At Colorado's residential electricity rate of 16.65¢/kWh, a 2026 Rivian R1S Tri Max (22in) (rated 44.6 kWh per 100 miles by the EPA) costs $7.42 to drive 100 miles on home charging, against $16.02 for the same distance in a car averaging 25.5 mpg on gasoline at $4.085/gallon. Charging at home is much cheaper than gas here: 53.7% less than gas per mile, here specifically.

Annual cost, at 15 thousands miles a year

At fueleconomy.gov's default of 15,000 annual miles, the 2026 Rivian R1S Tri Max (22in) costs roughly $1,113 a year to charge at home in Colorado, against roughly $2,403 a year for an equivalent gas car. That's a savings of about $1,290 a year.

Filling up the 2026 Rivian R1S Tri Max (22in), in dollars

Covering the 2026 Rivian R1S Tri Max (22in)'s EPA-rated 371-mile range takes about 165.4 kWh, which costs about $27.53 at Colorado's residential rate — figured from the EPA's own combined range and consumption numbers, not the pack's nameplate capacity.

How this compares nationally

This combination ranks 14,036 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Tri Max (22in) alone ranks 356 of 400 models for efficiency; Colorado alone ranks 30 of 51 states for electricity price.

Before you install a home charger in Colorado

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 Colorado electrician to quote the install before this math becomes a real decision.

Where these figures come from

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. Curious how Colorado's 16.65¢/kWh compares? The guide to charging cost by state ranks every state side by side.