Tankless Water Heater (Electric) in Louisville — $376/yr to Run (11.5¢/kWh)
Your tankless water heater (electric) in Louisville costs about $31/month at 11.5¢/kWh. See daily, monthly, and yearly costs, plus tips to cut your bill.
Louisville, KY Electricity Rate
11.5¢/kWh
Utility: Louisville Gas & Electric (LG&E)
-12% vs national avg
National avg: 13.0¢/kWh
Daily Cost
$1.03
9.0 kWh/day
Monthly Cost
$31.37
274 kWh/mo
Annual Cost
$376
3,285 kWh/yr
Lifetime (20yr)
$7,529
energy only
Monthly Cost Breakdown in Louisville
| Period | kWh | Louisville Cost | National Avg | Difference |
|---|---|---|---|---|
| Daily | 9.0 | $1.03 | $1.17 | $-0.14 |
| Weekly | 63.0 | $7.22 | $8.19 | $-0.97 |
| Monthly | 273.8 | $31.37 | $35.59 | $-4.22 |
| Quarterly | 821.3 | $94.12 | $106.76 | $-12.65 |
| Annual | 3285.0 | $376.46 | $427.05 | $-50.59 |
Customize Your Tankless Water Heater (Electric) Cost
Adjust usage hours and electricity rate to calculate your exact cost in Louisville.
Daily
$1.03
Monthly
$31.37
Annual
$376
20-Year
$7,529
Energy Saving Tips for Tankless Water Heater (Electric) in Louisville
- ✓Louisville has below-average electricity rates, but saving energy still reduces your carbon footprint.
- ✓An ENERGY STAR Tankless Water Heater (Electric) in Louisville saves ~$75/year compared to standard models.
- ✓A smart Tankless Water Heater (Electric) with scheduling optimization can save ~$56/year at Louisville rates.
- ✓Provides hot water on demand with no standby loss
- ✓Flush annually to remove scale
- ✓Requires dedicated electrical circuit
ENERGY STAR Savings: Upgrading to an ENERGY STAR Tankless Water Heater (Electric) in Louisville saves approximately $75/year at local rates — $1,506 over the appliance lifetime.
Highest-Cost Appliances in Louisville, KY
See which appliances cost the most to run at Louisville's 11.5¢/kWh electricity rate.
Level 2 EV Charger (240V)
Transportation · 7,200W
$1,485/yr
$123.77/mo
Electric Furnace
HVAC · 10,000W
$1,031/yr
$85.95/mo
Electric Tankless Water Heater
Water Heating · 18,000W
$753/yr
$62.74/mo
EV Charger (Level 2)
Garage · 7,200W
$743/yr
$61.88/mo
Boiler (Electric)
HVAC · 6,000W
$619/yr
$51.57/mo
Electric Water Heater (Tank)
Water Heating · 4,500W
$565/yr
$47.06/mo
Water Heater (Tank Electric)
Water Heating · 4,500W
$565/yr
$47.06/mo
Heat Pump
HVAC · 2,400W
$440/yr
$36.67/mo
Tankless Water Heater (Electric) Cost in Other Kentucky Cities
| City | Rate | Annual Cost | vs Louisville |
|---|---|---|---|
| Louisville (current) | 11.5¢ | $376 | — |
| Lexington | 12.7¢ | $418 | +$42 |
| Bowling Green | 12.1¢ | $396 | +$20 |
| Owensboro | 12.5¢ | $410 | +$34 |
Tankless Water Heater (Electric) Energy Cost FAQ — Louisville, KY
Understanding Tankless Water Heater (Electric) Energy Costs in Louisville, KY
In a major metro like Louisville, electricity demand is high and rates reflect the cost of maintaining infrastructure for 0.6 million residents. Running a high-draw appliance like the Tankless Water Heater (Electric) (18,000W) at Louisville's rate of 11.5¢/kWh costs approximately $376 per year — $51 less than the national average of $427.
Rates in Louisville are close to the national average, so the Tankless Water Heater (Electric)'s annual cost of $376 is broadly representative of what most US households pay. Over the 20-year expected lifespan, total energy cost reaches $7,529.
Louisville's cost of living index of 81 is below the national average, and electricity costs reflect that affordability. The Tankless Water Heater (Electric) adds $31.37/month to a typical bill of $121. Upgrading to an ENERGY STAR Tankless Water Heater (Electric) can cut energy use by up to 20%, saving approximately $75 per year at Louisville rates.
In Louisville's warm climate (avg 71.9°F), HVAC-related appliances tend to run more frequently, compounding energy costs. A Tankless Water Heater (Electric) produces approximately 2.35 tons of CO2 annually at typical usage. Louisville 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 Louisville.
Compare All Energy Costs in Louisville
See energy costs for 168+ household appliances at Louisville's local electricity rate.