Electric Tankless Water Heater Energy Cost Calculator
On-demand electric water heater that heats water only when needed, eliminating standby heat loss.
Power Draw
18,000W
watts
Annual kWh
2,920
avg usage
Annual Cost
$380
avg national
CO₂/Year
2.1 tons
carbon impact
Electric Tankless Water Heater Cost Calculator
Customize usage and your state's electricity rate for accurate cost estimates.
Daily Cost
$2.34
Monthly Cost
$71.17
Annual Cost
$854
Lifetime Cost
$17,082
Energy Saving Opportunities
ENERGY STARAvailable
Save up to 24% vs standard models
~$205/year savings
Smart VersionAvailable
Smart scheduling saves 15% more energy
~$128/year savings
Energy Saving Tips
- ✓Install point-of-use units for remote fixtures
- ✓Size properly for peak demand
- ✓Consider electrical upgrade
Compare Alternatives
| Appliance | Watts | Annual kWh | Annual Cost |
|---|---|---|---|
| Electric Tankless Water Heater (current) | 18,000W | 2,920 | $380 |
| Heat Pump Water Heater | 500W | 1,095 | $142 |
Electric Tankless Water Heater Cost Summary
Purchase Price (one-time)$1,800
Annual Energy Cost (at 13¢/kWh)$854
Lifespan 20 years
Lifetime Energy Cost (energy only)$17,082
Total Cost of Ownership (purchase + energy)$18,882
Electric Tankless Water Heater Energy FAQ
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