Cost to Run a Heat Pump Water Heater in Hawaii
Hawaii's average residential electricity rate is 46.6¢/kWh as of April 2026 — the 51st cheapest in the country, 148% above the U.S. average. At typical usage (3 hours/day), a heat pump water heater here costs $42.50 per month.
Per hour
$0.47
at 400–1,500 W
Per day
$1.40
3 hours/day
Per month
$42.50
91 kWh
Per year
$510
1,095 kWh
By usage level in Hawaii
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (1.5 hrs/day) | $0.70 | $21.25 | $255 |
| Typical (3 hrs/day) | $1.40 | $42.50 | $510 |
| Heavy (6 hrs/day) | $2.80 | $85.00 | $1,021 |
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 46.6¢/kWh (April 2026), a heat pump water heater with typical usage costs about $1.40 per day, $42.50 per month, or $510 per year.
Is running a heat pump water heater in Hawaii more expensive than average?
Yes. Hawaii's electricity costs about 148% more than the U.S. average, so the same usage costs $42.50 per month here versus $17.15 nationally.
What does electricity cost in Hawaii right now?
Hawaii residents pay an average of 46.6¢ per kWh as of April 2026 — the 51st cheapest rate of the 51 U.S. jurisdictions we track.