Tankless Water Heater (Electric) Energy Cost Calculator
On-demand water heater that heats water only when needed, eliminating standby losses.
Power Draw
18,000W
watts
Annual kWh
3,285
avg usage
Annual Cost
$427
avg national
CO₂/Year
2.35 tons
carbon impact
Tankless Water Heater (Electric) Cost Calculator
Customize usage and your state's electricity rate for accurate cost estimates.
Daily Cost
$1.17
Monthly Cost
$35.59
Annual Cost
$427
Lifetime Cost
$8,541
Energy Saving Opportunities
ENERGY STARAvailable
Save up to 20% vs standard models
~$85/year savings
Smart VersionAvailable
Smart scheduling saves 15% more energy
~$64/year savings
Energy Saving Tips
- ✓Provides hot water on demand with no standby loss
- ✓Flush annually to remove scale
- ✓Requires dedicated electrical circuit
Compare Alternatives
| Appliance | Watts | Annual kWh | Annual Cost |
|---|---|---|---|
| Tankless Water Heater (Electric) (current) | 18,000W | 3,285 | $427 |
| Electric Water Heater (Tank) | 4,500W | 4,927 | $641 |
| Heat Pump Water Heater | 500W | 1,095 | $142 |
Tankless Water Heater (Electric) Cost Summary
Purchase Price (one-time)$2,500
Annual Energy Cost (at 13¢/kWh)$427
Lifespan 20 years
Lifetime Energy Cost (energy only)$8,541
Total Cost of Ownership (purchase + energy)$11,041
Tankless Water Heater (Electric) Energy FAQ
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