2026 Rivian R1S Dual Large (20in): home charging cost in Delaware

In Delaware, home electricity runs 17.74¢/kWh — put a 2026 Rivian R1S Dual Large (20in)'s EPA-rated 42.9 kWh/100mi against that and 100 miles costs $7.61, versus $16.02 for a gas car averaging 25.5 mpg. Charging at home is much cheaper than gas here: 52.5% 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 R1S Dual Large (20in) charged at home in Delaware costs about $1,141/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,262 a year.

Cost of a full charge

A 2026 Rivian R1S Dual Large (20in) needs roughly 128.6 kWh to reach its EPA-rated 300-mile range, which runs about $22.82 at 17.74¢/kWh in Delaware.

2026 Rivian R1S Dual Large (20in) in Delaware, ranked

This combination ranks 14,374 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Dual Large (20in) alone ranks 316 of 400 models for efficiency; Delaware alone ranks 33 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.

Ask a licensed Delaware electrician to quote the install before this math becomes a real decision.

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.