Heat Pump Water Heater in Honolulu — $466/yr to Run (42.5¢/kWh)
Your heat pump water heater in Honolulu costs about $39/month at 42.5¢/kWh. See daily, monthly, and yearly costs, plus tips to cut your bill.
Honolulu, HI Electricity Rate
42.5¢/kWh
Utility: Hawaiian Electric (HECO)
+227% vs national avg
National avg: 13.0¢/kWh
Daily Cost
$1.28
3.0 kWh/day
Monthly Cost
$38.82
91 kWh/mo
Annual Cost
$466
1,095 kWh/yr
Lifetime (15yr)
$6,987
energy only
Monthly Cost Breakdown in Honolulu
| Period | kWh | Honolulu Cost | National Avg | Difference |
|---|---|---|---|---|
| Daily | 3.0 | $1.28 | $0.39 | +$0.89 |
| Weekly | 21.0 | $8.93 | $2.73 | +$6.20 |
| Monthly | 91.3 | $38.82 | $11.86 | +$26.96 |
| Quarterly | 273.8 | $116.45 | $35.59 | +$80.87 |
| Annual | 1095.0 | $465.81 | $142.35 | +$323.46 |
Customize Your Heat Pump Water Heater Cost
Adjust usage hours and electricity rate to calculate your exact cost in Honolulu.
Daily
$1.28
Monthly
$38.82
Annual
$466
15-Year
$6,987
Energy Saving Tips for Heat Pump Water Heater in Honolulu
- ✓Honolulu electricity rates are 227% above the national average — energy efficiency matters more here.
- ✓An ENERGY STAR Heat Pump Water Heater in Honolulu saves ~$140/year compared to standard models.
- ✓A smart Heat Pump Water Heater with scheduling optimization can save ~$93/year at Honolulu rates.
- ✓Keep in a warm area like a garage
- ✓Dont block airflow around unit
- ✓Use heat pump only mode for max savings
ENERGY STAR Savings: Upgrading to an ENERGY STAR Heat Pump Water Heater in Honolulu saves approximately $140/year at local rates — $2,096 over the appliance lifetime.
Highest-Cost Appliances in Honolulu, HI
See which appliances cost the most to run at Honolulu's 42.5¢/kWh electricity rate.
Level 2 EV Charger (240V)
Transportation · 7,200W
$5,513/yr
$459.43/mo
Electric Furnace
HVAC · 10,000W
$3,829/yr
$319.05/mo
Electric Tankless Water Heater
Water Heating · 18,000W
$2,795/yr
$232.91/mo
EV Charger (Level 2)
Garage · 7,200W
$2,757/yr
$229.72/mo
Boiler (Electric)
HVAC · 6,000W
$2,297/yr
$191.43/mo
Electric Water Heater (Tank)
Water Heating · 4,500W
$2,096/yr
$174.68/mo
Water Heater (Tank Electric)
Water Heating · 4,500W
$2,096/yr
$174.68/mo
Heat Pump
HVAC · 2,400W
$1,634/yr
$136.13/mo
Heat Pump Water Heater Cost in Other Hawaii Cities
| City | Rate | Annual Cost | vs Honolulu |
|---|---|---|---|
| Honolulu (current) | 42.5¢ | $466 | — |
| Maui | 41.5¢ | $455 | $-11 |
Heat Pump Water Heater Energy Cost FAQ — Honolulu, HI
Understanding Heat Pump Water Heater Energy Costs in Honolulu, HI
Honolulu is a mid-sized Hawaii city where residential electricity rates from Hawaiian Electric (HECO) are shaped by regional energy supply and local demand patterns. Running a low-draw appliance like the Heat Pump Water Heater (500W) at Honolulu's rate of 42.5¢/kWh costs approximately $466 per year — $323 more than the national average of $142.
Electricity in Honolulu is significantly more expensive than the national average — 227% higher. For a Heat Pump Water Heater used 6 hours per day, this rate premium adds up to $323 in extra annual costs. Energy-efficient models and usage habits have an outsized impact in high-rate markets like this.
Honolulu has a high cost of living (index: 193), which means electricity is just one of many above-average expenses. Reducing appliance energy costs — even by small amounts — contributes to meaningful household savings in this market. Upgrading to an ENERGY STAR Heat Pump Water Heater can cut energy use by up to 30%, saving approximately $140 per year at Honolulu rates.
In Honolulu's warm climate (avg 83.7°F), HVAC-related appliances tend to run more frequently, compounding energy costs. A Heat Pump Water Heater produces approximately 0.78 tons of CO2 annually at typical usage. Honolulu residents can reduce this footprint by choosing an ENERGY STAR certified unit, optimizing usage patterns, or investing in solar — see our solar savings calculator for Honolulu.
Compare All Energy Costs in Honolulu
See energy costs for 178+ household appliances at Honolulu's local electricity rate.
Frequently Asked Questions
How much does it cost to run a Heat Pump Water Heater in Honolulu, HI?
At Honolulu's average electricity rate of 42.5¢/kWh, a Heat Pump Water Heater costs approximately $466 per year to run. That's about $38.82 per month with typical usage of 6 hours per day.
What is the electricity rate in Honolulu, HI?
The average residential electricity rate in Honolulu, HI is 42.5¢/kWh, which is 227% above the national average of 13.0¢/kWh. The primary utility provider is Hawaiian Electric (HECO).
How much electricity does a Heat Pump Water Heater use per year?
A Heat Pump Water Heater uses approximately 500 watts and consumes about 1,095 kWh per year with typical usage of 6 hours/day for 365 days/year.
Is a Heat Pump Water Heater expensive to run in Honolulu?
Compared to the national average cost of $142/year, running a Heat Pump Water Heater in Honolulu costs $323 more per year due to higher local electricity rates.
How can I reduce my Heat Pump Water Heater energy cost in Honolulu?
To reduce Heat Pump Water Heater costs in Honolulu: Keep in a warm area like a garage. Dont block airflow around unit. Upgrading to an ENERGY STAR model saves up to 30% on energy costs. Also check with Hawaiian Electric (HECO) for local energy efficiency rebates and programs.