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Water Heater Electricity Cost

Estimate electric water heater monthly cost.

Inputs

Inputs and assumptions

Resistance tanks 3800-5500W; heat-pump tanks 400-800W compressor. Use duty share for your household.

How many of this device you run.

Hours per day

Fridges run 7; laundry may run 2-3.

Compressors and thermostats cycle; a fridge averages ~40%.

Rate

Result

Cost per year
$446.76
Energy per year
2,628 kWh
Share of average US home
25.0%
Cost per running hour
$0.408
Cost per day
$1.22
Energy per day
7.2 kWh
Cost per month
$36.72
Screening tool. Verify your utility tariff and equipment specs before deciding.

Frequently asked questions

How much does an electric water heater cost?

A 4,500W tank at typical family use runs $40 to $60 a month. It is often the second-biggest home load.

What temperature should I set?

120 F balances safety and cost. Each 10 degrees higher adds 3 to 5 percent standby loss.

Heat pump water heaters worth it?

They use a third of the energy. Payback is typically 2 to 4 years against resistance tanks.

Does insulation help?

Tank wraps and pipe insulation on older units save 5 to 10 percent for under $50.

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