Cost to run · Hawaii · 46.6¢/kWh residential average

How much does it cost to run an electric water heater in Hawaii?

$504/yr · median certified model

Hawaii is the extreme case for U.S. electricity costs: 46.6¢/kWh, roughly 2.5× the national average. The median certified electric water heater costs about $504 a year here — the same appliance would cost $204 at national-average rates. In this rate environment, the gap between an efficient and an inefficient electric water heater is often larger than the appliance's purchase-price difference over its lifetime.

Only 0 jurisdictions cost more: Hawaii ranks 51 of 51 for running an electric water heater. Model choice matters as much as geography: at Hawaii rates the most efficient certified model (Friedrich PROH40 T2 FD400-15) costs $300 a year while the most power-hungry (Smart Solar SSG2-ES 120) costs $812 — a spread of $512 every year. For reference, the national extremes are North Dakota (12.3¢/kWh) and Hawaii (46.6¢/kWh); the same median electric water heater would cost $134 and $504 a year there.