2026 Rivian R1S Tri Max (22in): home charging cost in Delaware

A 2026 Rivian R1S Tri Max (22in) draws 44.6 kWh per 100 miles per the EPA; at Delaware's 17.74¢/kWh residential rate that's $7.91 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: 50.6% less than gas per mile, here specifically.

2026 Rivian R1S Tri Max (22in): yearly cost in Delaware

Driving 15,000 miles a year — fueleconomy.gov's own default assumption — a 2026 Rivian R1S Tri Max (22in) charged at home in Delaware costs about $1,186/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,217 a year.

Cost of a full charge

A 2026 Rivian R1S Tri Max (22in) needs roughly 165.4 kWh to reach its EPA-rated 371-mile range, which runs about $29.34 at 17.74¢/kWh in Delaware.

Where this ranks

This combination ranks 14,910 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; Delaware alone ranks 33 of 51 states for electricity price.

Before you install a home charger in Delaware

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 Delaware before deciding.

Where these figures come from

The methodology guide names the exact EIA and EPA tables behind this page's numbers. Delaware's 17.74¢/kWh rate ranks 33 of 51 states; the state rate guide lays out the full spread.