Cost to Run a Heat Pump Water Heater in Hawaii
Hawaii's average residential electricity rate is 48¢/kWh as of July 2026 — the 51st cheapest in the country, 162% above the U.S. average. At typical usage (3 hours/day), a heat pump water heater here costs $43.78 per month.
Per hour
$0.48
at 400–1,500 W
Per day
$1.44
3 hours/day
Per month
$43.78
91 kWh
Per year
$526
1,095 kWh
By usage level in Hawaii
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (1.5 hrs/day) | $0.72 | $21.89 | $263 |
| Typical (3 hrs/day) | $1.44 | $43.78 | $526 |
| Heavy (6 hrs/day) | $2.88 | $87.55 | $1,051 |
Hawaii vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a heat pump water heater in Hawaii?
At Hawaii's current average residential rate of 48¢/kWh (July 2026), a heat pump water heater with typical usage costs about $1.44 per day, $43.78 per month, or $526 per year.
Is running a heat pump water heater in Hawaii more expensive than average?
Yes. Hawaii's electricity costs about 162% more than the U.S. average, so the same usage costs $43.78 per month here versus $16.69 nationally.
What does electricity cost in Hawaii right now?
Hawaii residents pay an average of 48¢ per kWh as of July 2026 — the 51st cheapest rate of the 51 U.S. jurisdictions we track.