2027 Hyundai Ioniq 9 RWD, HI Charging Cost

2027 Hyundai Ioniq 9 RWD: home charging cost in Hawaii

At Hawaii's residential electricity rate of 45.95¢/kWh, a 2027 Hyundai Ioniq 9 RWD (rated 37 kWh per 100 miles by the EPA) costs $17 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. This model costs more to charge at home than gas would here: 6.1% more than gas per mile here, not less, the arithmetic isn't clamped to always favor charging.

Annual cost, at 15 thousands miles a year

Driving 15,000 miles a year, fueleconomy.gov's own default assumption, a 2027 Hyundai Ioniq 9 RWD charged at home in Hawaii costs about $2,550/year in electricity, against about $2,403/year for the gas-car comparison. That's about $147 MORE a year than the gas comparison, not less.

Filling up the 2027 Hyundai Ioniq 9 RWD, in dollars

A 2027 Hyundai Ioniq 9 RWD needs roughly 124 kWh to reach its EPA-rated 335-mile range, which runs about $56.96 at 45.95¢/kWh in Hawaii.

How this compares nationally

This combination ranks 20,171 of 20,400 state/model pairs for cost savings against gas (1 is cheapest). The Hyundai Ioniq 9 RWD alone ranks 193 of 400 models for efficiency; Hawaii alone ranks 51 of 51 states for electricity price.

Next step: home charger installation

The numbers above assume Level 2 home charging is already in place, the electrical work behind that is a real, separate cost that varies by panel, wiring, and local labor rates, not something this page's per-mile math includes.

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

Where these figures come from

Every figure on this page traces to a named EIA or EPA dataset, see the methodology guide. 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.