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

At Hawaii's residential electricity rate of 45.95¢/kWh, a 2026 Rivian R1S Dual Large Plus (20in) (rated 43.1 kWh per 100 miles by the EPA) costs $19.82 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. Here the math runs the other way: 23.7% more per mile than gasoline, because Hawaii's rate and this model's efficiency combine unfavorably.

2026 Rivian R1S Dual Large Plus (20in): yearly cost in Hawaii

Hawaii owners putting 15,000 annual miles on a 2026 Rivian R1S Dual Large Plus (20in) spend about $2,972 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. At this mileage, that's roughly $569 a year worse than the gas comparison.

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

At Hawaii's rate, fully covering this 2026 Rivian R1S Dual Large Plus (20in)'s 317-mile EPA range costs about $62.81 (136.7 kWh) — the energy the EPA test actually used, not the battery's rated size.

Where this ranks

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1S Dual Large Plus (20in) in Hawaii ranks 20,317 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 Hawaii ranks 51 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 Hawaii electrician to quote the install before this math becomes a real decision.

More on how this number was built

See the methodology guide for exactly which EIA and EPA figures feed 2026 Rivian R1S Dual Large Plus (20in)'s cost in Hawaii. This is one of the combinations where charging costs more than gas — the guide to when that happens explains why the arithmetic can go either way.