Smart Plug in Honolulu — $4/yr to Run (42.5¢/kWh)
Your smart plug in Honolulu costs about $0/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
$0.01
0.0 kWh/day
Monthly Cost
$0.31
1 kWh/mo
Annual Cost
$4
9 kWh/yr
Lifetime (5yr)
$19
energy only
Monthly Cost Breakdown in Honolulu
| Period | kWh | Honolulu Cost | National Avg | Difference |
|---|---|---|---|---|
| Daily | 0.0 | $0.01 | $0.00 | +$0.01 |
| Weekly | 0.2 | $0.07 | $0.02 | +$0.05 |
| Monthly | 0.7 | $0.31 | $0.09 | +$0.22 |
| Quarterly | 2.2 | $0.93 | $0.28 | +$0.65 |
| Annual | 8.8 | $3.73 | $1.14 | +$2.59 |
Customize Your Smart Plug Cost
Adjust usage hours and electricity rate to calculate your exact cost in Honolulu.
Daily
$0.01
Monthly
$0.31
Annual
$4
5-Year
$19
Energy Saving Tips for Smart Plug in Honolulu
- ✓Honolulu electricity rates are 227% above the national average — energy efficiency matters more here.
- ✓A smart Smart Plug with scheduling optimization can save ~$4/year at Honolulu rates.
- ✓Use to eliminate phantom loads from appliances
- ✓Schedule lamps and holiday lights
- ✓Monitor energy usage of connected devices
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
Smart Plug Cost in Other Hawaii Cities
| City | Rate | Annual Cost | vs Honolulu |
|---|---|---|---|
| Honolulu (current) | 42.5¢ | $4 | — |
| Maui | 41.5¢ | $4 | $-0 |
Smart Plug Energy Cost FAQ — Honolulu, HI
Understanding Smart Plug 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 Smart Plug (1W) at Honolulu's rate of 42.5¢/kWh costs approximately $4 per year — $3 more than the national average of $1.
Electricity in Honolulu is significantly more expensive than the national average — 227% higher. For a Smart Plug used 24 hours per day, this rate premium adds up to $3 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. While no ENERGY STAR version is available, a smart Smart Plug with automated scheduling can reduce consumption by 100%, saving $4/year.
In Honolulu's warm climate (avg 83.7°F), HVAC-related appliances tend to run more frequently, compounding energy costs. A Smart Plug produces approximately 0.01 tons of CO2 annually at typical usage. Honolulu residents can reduce this footprint by 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 Smart Plug in Honolulu, HI?
At Honolulu's average electricity rate of 42.5¢/kWh, a Smart Plug costs approximately $4 per year to run. That's about $0.31 per month with typical usage of 24 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 Smart Plug use per year?
A Smart Plug uses approximately 1 watts and consumes about 9 kWh per year with typical usage of 24 hours/day for 365 days/year.
Is a Smart Plug expensive to run in Honolulu?
Compared to the national average cost of $1/year, running a Smart Plug in Honolulu costs $3 more per year due to higher local electricity rates.
How can I reduce my Smart Plug energy cost in Honolulu?
To reduce Smart Plug costs in Honolulu: Use to eliminate phantom loads from appliances. Schedule lamps and holiday lights. Consider using a smart plug to monitor and optimize usage. Also check with Hawaiian Electric (HECO) for local energy efficiency rebates and programs.