Electric Water Heater (Tank) in Honolulu — $2,096/yr to Run (42.5¢/kWh)
Your electric water heater (tank) in Honolulu costs about $175/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
$5.74
13.5 kWh/day
Monthly Cost
$174.68
411 kWh/mo
Annual Cost
$2,096
4,928 kWh/yr
Lifetime (12yr)
$25,154
energy only
Monthly Cost Breakdown in Honolulu
| Period | kWh | Honolulu Cost | National Avg | Difference |
|---|---|---|---|---|
| Daily | 13.5 | $5.74 | $1.76 | +$3.99 |
| Weekly | 94.5 | $40.20 | $12.29 | +$27.92 |
| Monthly | 410.6 | $174.68 | $53.38 | +$121.30 |
| Quarterly | 1231.9 | $524.04 | $160.14 | +$363.90 |
| Annual | 4927.5 | $2096.16 | $640.58 | +$1455.58 |
Customize Your Electric Water Heater (Tank) Cost
Adjust usage hours and electricity rate to calculate your exact cost in Honolulu.
Daily
$5.74
Monthly
$174.68
Annual
$2,096
12-Year
$25,154
Energy Saving Tips for Electric Water Heater (Tank) in Honolulu
- ✓Honolulu electricity rates are 227% above the national average — energy efficiency matters more here.
- ✓An ENERGY STAR Electric Water Heater (Tank) in Honolulu saves ~$314/year compared to standard models.
- ✓A smart Electric Water Heater (Tank) with scheduling optimization can save ~$314/year at Honolulu rates.
- ✓Set temperature to 120F
- ✓Insulate tank and hot water pipes
- ✓Drain sediment annually
ENERGY STAR Savings: Upgrading to an ENERGY STAR Electric Water Heater (Tank) in Honolulu saves approximately $314/year at local rates — $3,773 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
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
Hot Tub / Spa
Pool & Spa · 3,000W
$1,531/yr
$127.62/mo
Electric Water Heater (Tank) Cost in Other Hawaii Cities
| City | Rate | Annual Cost | vs Honolulu |
|---|---|---|---|
| Honolulu (current) | 42.5¢ | $2,096 | — |
| Maui | 41.5¢ | $2,047 | $-49 |
Electric Water Heater (Tank) Energy Cost FAQ — Honolulu, HI
Understanding Electric Water Heater (Tank) 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 high-draw appliance like the Electric Water Heater (Tank) (4,500W) at Honolulu's rate of 42.5¢/kWh costs approximately $2,096 per year — $1456 more than the national average of $641.
Electricity in Honolulu is significantly more expensive than the national average — 227% higher. For a Electric Water Heater (Tank) used 3 hours per day, this rate premium adds up to $1,456 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 Electric Water Heater (Tank) can cut energy use by up to 15%, saving approximately $314 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 Electric Water Heater (Tank) produces approximately 3.52 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 an Electric Water Heater (Tank) in Honolulu, HI?
At Honolulu's average electricity rate of 42.5¢/kWh, an Electric Water Heater (Tank) costs approximately $2,096 per year to run. That's about $174.68 per month with typical usage of 3 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 an Electric Water Heater (Tank) use per year?
A Electric Water Heater (Tank) uses approximately 4,500 watts and consumes about 4,928 kWh per year with typical usage of 3 hours/day for 365 days/year.
Is an Electric Water Heater (Tank) expensive to run in Honolulu?
Compared to the national average cost of $641/year, running an Electric Water Heater (Tank) in Honolulu costs $1456 more per year due to higher local electricity rates.
How can I reduce my Electric Water Heater (Tank) energy cost in Honolulu?
To reduce Electric Water Heater (Tank) costs in Honolulu: Set temperature to 120F. Insulate tank and hot water pipes. Upgrading to an ENERGY STAR model saves up to 15% on energy costs. Also check with Hawaiian Electric (HECO) for local energy efficiency rebates and programs.