2027 Rivian R1S Premium Long Range (20in AT): home charging cost in Delaware

A 2027 Rivian R1S Premium Long Range (20in AT) draws 43.2 kWh per 100 miles per the EPA; at Delaware's 17.74¢/kWh residential rate that's $7.67 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: 52.1% 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 2027 Rivian R1S Premium Long Range (20in AT) charged at home in Delaware costs about $1,150/year in electricity, against about $2,403/year for the gas-car comparison. That's a savings of about $1,253 a year.

Filling up the 2027 Rivian R1S Premium Long Range (20in AT), in dollars

A 2027 Rivian R1S Premium Long Range (20in AT) needs roughly 159.9 kWh to reach its EPA-rated 370-mile range, which runs about $28.37 at 17.74¢/kWh in Delaware.

Where this ranks

This combination ranks 14,508 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Rivian R1S Premium Long Range (20in AT) alone ranks 331 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.

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

Where these figures come from

See the methodology guide for exactly which EIA and EPA figures feed 2027 Rivian R1S Premium Long Range (20in AT)'s cost in Delaware. At 17.74¢/kWh, Delaware sits in the middle of the national range — the guide to why charging cost varies by state shows where.