What it costs to charge a 2027 Rivian R1S Premium (20in AT) in Delaware

A 2027 Rivian R1S Premium (20in AT) draws 44.4 kWh per 100 miles per the EPA; at Delaware's 17.74¢/kWh residential rate that's $7.87 per 100 miles charged at home, versus $16.02 for a 25.5-mpg gas car covering the same distance. That works out to 50.9% cheaper per mile than gasoline in Delaware — charging at home is much cheaper than gas here.

What a year of driving costs

Home charging this 2027 Rivian R1S Premium (20in AT) in Delaware runs about $1,180 over fueleconomy.gov's default 15,000 annual miles, versus about $2,403 for the gasoline equivalent. Call it about $1,222 saved annually, at this mileage.

What one full charge costs

$22.74 — that's what Delaware's 17.74¢/kWh rate puts on the 128.2 kWh a 2027 Rivian R1S Premium (20in AT) needs for its full 289-mile EPA range.

Where this ranks

Among all 20,400 state-and-model combinations this site tracks, charging a 2027 Rivian R1S Premium (20in AT) in Delaware ranks 14,838 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Premium (20in AT) ranks 342 of 400 EV models for raw efficiency, and Delaware ranks 33 of 51 for cheapest residential electricity.

Next step: home charger installation

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 Delaware before deciding.

More on how this number was built

The methodology guide names the exact EIA and EPA tables behind this page's numbers. At 17.74¢/kWh, Delaware sits in the middle of the national range — the guide to why charging cost varies by state shows where.