Charging a 2026 Rivian R1S All-Terrain Performance Dual Large (20in) at home in Hawaii
At Hawaii's residential electricity rate of 45.95¢/kWh, a 2026 Rivian R1S All-Terrain Performance Dual Large (20in) (rated 44.4 kWh per 100 miles by the EPA) costs $20.38 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: 27.2% more per mile than gasoline, because Hawaii's rate and this model's efficiency combine unfavorably.
Annual cost, at 15 thousands miles a year
Hawaii owners putting 15,000 annual miles on a 2026 Rivian R1S All-Terrain Performance Dual Large (20in) spend about $3,058 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. At this mileage, that's roughly $655 a year worse than the gas comparison.
Cost of a full charge
At Hawaii's rate, fully covering this 2026 Rivian R1S All-Terrain Performance Dual Large (20in)'s 289-mile EPA range costs about $58.91 (128.2 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 All-Terrain Performance Dual Large (20in) in Hawaii ranks 20,336 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S All-Terrain Performance Dual Large (20in) ranks 345 of 400 EV models for raw efficiency, and Hawaii ranks 51 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 Hawaii before deciding.
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.