What it costs to charge a 2026 Rivian R1S All-Terrain Dual Large Plus (20in) in Hawaii

At Hawaii's residential electricity rate of 45.95¢/kWh, a 2026 Rivian R1S All-Terrain Dual Large Plus (20in) (rated 46.9 kWh per 100 miles by the EPA) costs $21.54 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: 34.5% more per mile than gasoline, because Hawaii's rate and this model's efficiency combine unfavorably.

Annual cost, at 15 thousands miles a year

Home charging this 2026 Rivian R1S All-Terrain Dual Large Plus (20in) in Hawaii runs about $3,232 over fueleconomy.gov's default 15,000 annual miles, versus about $2,403 for the gasoline equivalent. At this mileage, that's roughly $829 a year worse than the gas comparison.

Cost of a full charge

$62.91 — that's what Hawaii's 45.95¢/kWh rate puts on the 136.9 kWh a 2026 Rivian R1S All-Terrain Dual Large Plus (20in) needs for its full 292-mile EPA range.

2026 Rivian R1S All-Terrain Dual Large Plus (20in) in Hawaii, ranked

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1S All-Terrain Dual Large Plus (20in) in Hawaii ranks 20,358 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S All-Terrain Dual Large Plus (20in) ranks 365 of 400 EV models for raw efficiency, and Hawaii ranks 51 of 51 for cheapest residential electricity.

Before you install a home charger in Hawaii

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

The methodology guide names the exact EIA and EPA tables behind this page's numbers. 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.