Heating · Hawaii
How Much Does It Cost to Run a Heat Pump in Hawaii?
The short answer
In Hawaii, a heat pump drawing 3,000W costs about $1.44 per hour — roughly $350 a month if it runs 8 hours a day.
Hawaii’s average residential rate was 48.0¢ per kWh in July 2026 (EIA), 162% above the US average.
Source: U.S. EIA, July 2026 data · Updated
Heat Pump cost by daily use in Hawaii
| Daily use | kWh/month | Per day | Per month | Per year |
|---|---|---|---|---|
| 1 hour/day | 91.3 | $1.44 | $43.80 | $526 |
| 2 hours/day | 182.5 | $2.88 | $87.61 | $1,051 |
| 4 hours/day | 365.0 | $5.76 | $175 | $2,102 |
| 8 hours/day | 730.1 | $11.52 | $350 | $4,205 |
| 12 hours/day | 1,095.1 | $17.28 | $526 | $6,307 |
| 24 hours/day | 2,190.2 | $34.56 | $1,051 | $12,614 |
Hawaii vs other states
Hawaii has the most expensive electricity in the country, so running a heat pump here costs $3,091 more a year than in Louisiana at the same usage.
Hawaii has the most expensive residential electricity of the 50 states and DC. Hawaii electricity rates · all states ranked
Electricity price trend in Hawaii
48.0¢/kWh in July 2026 — ▲ +22.0% from a year earlier.
How to lower the cost of running a heat pump
Heat pumps don't make heat — they move it from the outside air into your home (or the reverse in summer). That is why a heat pump drawing 3,000W can deliver 6,000–12,000W of heat, depending on outdoor temperature. Our estimate uses the electrical draw of the outdoor unit and air handler while the system is running; enter the number of hours per day the system actually runs, not the hours you are home. On very cold days the backup electric resistance strips can switch on and roughly double the draw, so winter bills in cold states can run higher than this estimate.
- Avoid big thermostat setbacks in winter — recovering from a deep setback can trigger expensive backup heat strips.
- Clean or replace the air filter every 1–3 months to keep airflow and efficiency up.
- Keep the outdoor unit clear of snow, leaves and plants.
Questions
Frequently asked questions
How much does it cost to run a heat pump for 24 hours in Hawaii?
Running a 3,000W heat pump for 24 hours uses about 72.0 kWh, which costs about $34.56 at Hawaii’s average rate of 48.0¢/kWh.
How many kWh does a heat pump use per month?
At 8 hours a day, a typical heat pump uses about 730 kWh a month. In Hawaii that costs $350.
Is it expensive to run a heat pump in Hawaii?
Hawaii has the most expensive residential electricity of the 50 states and DC at 48.0¢/kWh — one of the most expensive. Running a heat pump here costs about $4,205 a year at typical use, compared with $1,604 at the national average rate.
What is the electricity rate in Hawaii right now?
The average residential electricity rate in Hawaii was 48.0¢ per kWh in July 2026, according to the latest EIA data — up 22.0% from a year earlier.
Is a heat pump cheaper to run than a space heater?
Per unit of heat, yes — usually 2–4 times cheaper, because a heat pump moves heat instead of making it. A space heater only wins if you need to heat one small room for a short time.
Heat Pump costs in nearby states
Other appliances in Hawaii
Cheapest and priciest states
Comparisons
Sources & method
- Electricity rates: U.S. Energy Information Administration, Electric Power Monthly — average residential retail price, July 2026 (latest available). Retrieved .
- CO₂: EIA State Electricity Profiles, 2024 emissions rate of in-state power generation.
- Default usage for heat pump: 8 hours a day. Typical power 3,000W.
- Formulas, duty cycles and limitations: methodology. Data download: open data (CC BY 4.0).