Charging a 2026 Rivian R1S Dual Large Plus (20in) at home in Delaware

In Delaware, home electricity runs 17.74¢/kWh — put a 2026 Rivian R1S Dual Large Plus (20in)'s EPA-rated 43.1 kWh/100mi against that and 100 miles costs $7.65, versus $16.02 for a gas car averaging 25.5 mpg. That works out to 52.2% cheaper per mile than gasoline in Delaware — charging at home is much cheaper than gas here.

What a year of driving costs

Delaware owners putting 15,000 annual miles on a 2026 Rivian R1S Dual Large Plus (20in) spend about $1,148 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,255 saved annually, at this mileage.

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

At Delaware's rate, fully covering this 2026 Rivian R1S Dual Large Plus (20in)'s 317-mile EPA range costs about $24.25 (136.7 kWh) — the energy the EPA test actually used, not the battery's rated size.

How this compares nationally

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1S Dual Large Plus (20in) in Delaware ranks 14,475 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Dual Large Plus (20in) ranks 327 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 Dual Large Plus (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

The methodology guide names the exact EIA and EPA tables behind this page's numbers. Curious how Delaware's 17.74¢/kWh compares? The guide to charging cost by state ranks every state side by side.