Cost to Run Tankless Water Heater in Hawaii (2026)
At Hawaii's average rate of 43.18¢/kWh, running a Tankless Water Heater costs $90.68/month or $1,103.25/year. That's 150.8% more than the national average of $36.16/month.
Monthly Cost
$90.68
in Hawaii
Yearly Cost
$1,103.25
in Hawaii
State Rate
43.18¢
per kWh
National Rank
#50
of 50 states
Tankless Water Heater Energy Usage
| Wattage | 7,000 watts |
| Typical Daily Use | 1 hours/day |
| Daily kWh | 7.00 kWh |
| Monthly kWh | 210.0 kWh |
| Category | Heating |
Hawaii vs National Average: Tankless Water Heater Costs
| Metric | Hawaii | National Avg | Difference |
|---|---|---|---|
| Electricity Rate | 43.18¢/kWh | 17.22¢/kWh | +25.96¢ |
| Monthly Tankless Water Heater Cost | $90.68 | $36.16 | +$54.52 |
| Yearly Tankless Water Heater Cost | $1,103.25 | $439.97 | +$663.28 |
Tankless Water Heater Cost: All 50 States Ranked
Hawaii ranks #50 out of 50 for Tankless Water Heater running costs (1 = cheapest).
| # | State | Rate | Monthly | Yearly |
|---|---|---|---|---|
| 1 | Idaho | 11.15¢ | $23.42 | $284.88 |
| 2 | Washington | 11.26¢ | $23.65 | $287.69 |
| 3 | Utah | 11.41¢ | $23.96 | $291.53 |
| 4 | Wyoming | 11.72¢ | $24.61 | $299.45 |
| 5 | North Dakota | 12.43¢ | $26.10 | $317.59 |
| 6 | Louisiana | 12.52¢ | $26.29 | $319.89 |
| 7 | Oregon | 12.55¢ | $26.36 | $320.65 |
| 8 | Montana | 12.81¢ | $26.90 | $327.30 |
| 9 | Oklahoma | 12.82¢ | $26.92 | $327.55 |
| 10 | Tennessee | 12.91¢ | $27.11 | $329.85 |
| 11 | Arkansas | 13.04¢ | $27.38 | $333.17 |
| 12 | Nebraska | 13.08¢ | $27.47 | $334.19 |
| 13 | Kentucky | 13.19¢ | $27.70 | $337.00 |
| 14 | West Virginia | 13.44¢ | $28.22 | $343.39 |
| 15 | Mississippi | 13.54¢ | $28.43 | $345.95 |
| 16 | South Dakota | 13.74¢ | $28.85 | $351.06 |
| 17 | Missouri | 13.78¢ | $28.94 | $352.08 |
| 18 | North Carolina | 14.09¢ | $29.59 | $360.00 |
| 19 | Georgia | 14.27¢ | $29.97 | $364.60 |
| 20 | South Carolina | 14.43¢ | $30.30 | $368.69 |
| 21 | Virginia | 14.64¢ | $30.74 | $374.05 |
| 22 | Arizona | 14.78¢ | $31.04 | $377.63 |
| 23 | Alabama | 14.87¢ | $31.23 | $379.93 |
| 24 | Nevada | 14.92¢ | $31.33 | $381.21 |
| 25 | Delaware | 14.94¢ | $31.37 | $381.72 |
| 26 | Texas | 15.06¢ | $31.63 | $384.78 |
| 27 | Iowa | 15.14¢ | $31.79 | $386.83 |
| 28 | Ohio | 15.21¢ | $31.94 | $388.62 |
| 29 | Kansas | 15.28¢ | $32.09 | $390.40 |
| 30 | New Mexico | 15.34¢ | $32.21 | $391.94 |
| 31 | Indiana | 15.42¢ | $32.38 | $393.98 |
| 32 | Colorado | 15.56¢ | $32.68 | $397.56 |
| 33 | Minnesota | 15.63¢ | $32.82 | $399.35 |
| 34 | Florida | 16.22¢ | $34.06 | $414.42 |
| 35 | Illinois | 16.27¢ | $34.17 | $415.70 |
| 36 | Maryland | 16.57¢ | $34.80 | $423.36 |
| 37 | Wisconsin | 17.38¢ | $36.50 | $444.06 |
| 38 | Pennsylvania | 18.36¢ | $38.56 | $469.10 |
| 39 | New Jersey | 18.48¢ | $38.81 | $472.16 |
| 40 | Michigan | 19.34¢ | $40.61 | $494.14 |
| 41 | Vermont | 21.43¢ | $45.00 | $547.54 |
| 42 | Alaska | 24.21¢ | $50.84 | $618.57 |
| 43 | New York | 24.33¢ | $51.09 | $621.63 |
| 44 | New Hampshire | 25.78¢ | $54.14 | $658.68 |
| 45 | Maine | 26.37¢ | $55.38 | $673.75 |
| 46 | Rhode Island | 28.08¢ | $58.97 | $717.44 |
| 47 | Massachusetts | 28.58¢ | $60.02 | $730.22 |
| 48 | Connecticut | 29.98¢ | $62.96 | $765.99 |
| 49 | California | 31.22¢ | $65.56 | $797.67 |
| 50 | Hawaii | 43.18¢ | $90.68 | $1,103.25 |
Save Money on Tankless Water Heater in Hawaii
- Lower your thermostat by 7-10F for 8 hours a day to save up to 10% on Tankless Water Heater heating costs.
- Use a smart thermostat to optimize Tankless Water Heater usage based on your schedule in Hawaii.
- Improve home insulation in attics, walls, and floors to retain heat better.
- Use zone heating to warm only occupied rooms instead of your entire home.
- Look for Energy Star certified Tankless Water Heater models that use 10-50% less energy than standard models.
- Consider installing solar panels in Hawaii to offset your Tankless Water Heater electricity costs.
- Check if your Hawaii utility offers time-of-use rates and run your Tankless Water Heater during off-peak hours.
- Ensure proper maintenance of your Tankless Water Heater to keep it running at peak efficiency.
Related Pages
More about Hawaii
More about Tankless Water Heater
Frequently Asked Questions
How much does it cost to run a Tankless Water Heater in Hawaii?
Running a Tankless Water Heater in Hawaii costs approximately $90.68 per month or $1,103.25 per year, based on the state's average residential rate of 43.18¢/kWh and typical usage of 1 hours per day.
Is running a Tankless Water Heater expensive in Hawaii compared to other states?
Hawaii ranks #50 out of 50 states for Tankless Water Heater running costs (1 = cheapest). It's 150.8% more expensive than the national average. The cheapest state is Idaho at $23.42/month, and the most expensive is Hawaii at $90.68/month.
How much electricity does a Tankless Water Heater use per month?
A typical Tankless Water Heater uses 7000 watts and runs about 1 hours per day, consuming approximately 7.00 kWh daily or 210.0 kWh per month.
How can I reduce Tankless Water Heater electricity costs in Hawaii?
You can reduce costs by using an Energy Star rated Tankless Water Heater, running it during off-peak hours if your utility offers time-of-use rates, ensuring proper maintenance, and considering solar panels to offset electricity costs in Hawaii.
What is the electricity rate in Hawaii?
The average residential electricity rate in Hawaii is 43.18¢ per kWh. The primary energy source is Solar, with 18.0% from renewable sources.
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Data verified March 2026 · Source: U.S. Energy Information Administration (EIA)