What it costs to charge a 2026 Rivian R1S Performance Dual Large (20in) in Delaware

At Delaware's residential electricity rate of 17.74¢/kWh, a 2026 Rivian R1S Performance Dual Large (20in) (rated 42.9 kWh per 100 miles by the EPA) costs $7.61 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. That works out to 52.5% cheaper per mile than gasoline in Delaware — charging at home is much cheaper than gas here.

Annual cost, at 15 thousands miles a year

Home charging this 2026 Rivian R1S Performance Dual Large (20in) in Delaware runs about $1,141 over fueleconomy.gov's default 15,000 annual miles, versus about $2,403 for the gasoline equivalent. Call it about $1,262 saved annually, at this mileage.

Filling up the 2026 Rivian R1S Performance Dual Large (20in), in dollars

$22.82 — that's what Delaware's 17.74¢/kWh rate puts on the 128.6 kWh a 2026 Rivian R1S Performance Dual Large (20in) needs for its full 300-mile EPA range.

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

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1S Performance Dual Large (20in) in Delaware ranks 14,376 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Performance Dual Large (20in) ranks 317 of 400 EV models for raw efficiency, and Delaware ranks 33 of 51 for cheapest residential electricity.

Getting set up to charge a 2026 Rivian R1S Performance Dual Large (20in) at home

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.

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

More on how this number was built

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. Curious how Delaware's 17.74¢/kWh compares? The guide to charging cost by state ranks every state side by side.