WattCost

Data through June 2026

Running cost · Water Heaters (Electric) · ENERGY STAR certified

A. O. Smith HPTU-50N 1

For a standard household draw pattern, the A. O. Smith HPTU-50N 1 uses a certified 902 kWh per year: roughly $165 annually at the national average rate. Compared with the median certified electric water heater, it uses 25% less electricity — rank 121 out of 510. Where you live moves the bill from $118 a year in Nevada to $476 in Hawaii.

Dimensions 63" H × 15" W

Estimated annual running cost · U.S. average rate 18.3¢/kWh

$165/yr

$125 · cheapest certified water heaters (electric)$319 · priciest
Per month
$13.79
Per day
45¢
Certified use
902 kWh/yr
Type
Hybrid/Electric Heat Pump
Heat pump type
240 Volt Integrated HPWH
Storage volume
46 gal
First-hour rating
66 gal
UEF
3.45
681 kWh1,741 kWh
Where the A. O. Smith HPTU-50N 1 (▮) sits among all 510 certified water heaters (electric), by annual kWh

What it costs in every state

A. O. Smith HPTU-50N 1: 902 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$148
Alaska28.2¢$254
Arizona15.2¢$137
Arkansas14.1¢$127
California34.7¢$313
Colorado17.1¢$155
Connecticut24.3¢$219
Delaware19.3¢$174
District of Columbia24.4¢$220
Florida15.1¢$136
Georgia16.4¢$148
Hawaiipriciest52.7¢$476
Idaho14.4¢$130
Illinois19.9¢$179
Indiana17.5¢$158
Iowa15.9¢$144
Kansas15.7¢$142
Kentucky14.3¢$129
Louisiana13.5¢$122
Maine29.6¢$267
Maryland21.8¢$197
Massachusetts29.6¢$267
Michigan23.0¢$207
Minnesota17.5¢$158
Mississippi14.9¢$134
Missouri16.2¢$146
Montana15.1¢$137
Nebraska13.3¢$120
Nevadacheapest13.1¢$118
New Hampshire27.0¢$244
New Jersey24.9¢$225
New Mexico15.1¢$136
New York29.5¢$266
North Carolina14.7¢$133
North Dakota14.1¢$127
Ohio19.2¢$173
Oklahoma14.3¢$129
Oregon16.3¢$147
Pennsylvania21.7¢$196
Rhode Island29.2¢$264
South Carolina15.6¢$140
South Dakota15.4¢$139
Tennessee14.1¢$127
Texas15.9¢$144
Utah13.4¢$121
Vermont24.4¢$220
Virginia17.2¢$155
Washington14.9¢$134
West Virginia15.4¢$139
Wisconsin19.6¢$176
Wyoming15.2¢$137

Certified models closest in efficiency

electric water heaters within reach of 902 kWh/yr
ModelkWh/yr$/yr (US avg)
A. O. Smith CAHP-40 2902$165
A. O. Smith HP1050H45DV 1902$165
A. O. Smith HP1050H45DVCTA-1902$165
A. O. Smith HPA10-40H45DV 2902$165
A. O. Smith HPTA-40 2902$165
A. O. Smith HPTU-50CTA 1902$165

Run your own numbers

Your rate, your numbers

Per day
45¢
Per month
$13.79
Per year
$165

902 kWh/yr × 18.3¢/kWh = $165/yr

Prefilled with this model's certified 902 kWh/yr — adjust if your usage differs from the DOE test basis. The certified annual kWh comes from the DOE Uniform Energy Factor test, which simulates a typical household's daily hot-water draw pattern. Only electric models (including heat-pump units) are listed — gas models burn gas, not kWh.

Questions, answered with the data

How much electricity does the A. O. Smith HPTU-50N 1 use?
ENERGY STAR certifies the A. O. Smith HPTU-50N 1 at 902 kWh per year. The certified annual kWh comes from the DOE Uniform Energy Factor test, which simulates a typical household's daily hot-water draw pattern. Only electric models (including heat-pump units) are listed — gas models burn gas, not kWh.
How much does the A. O. Smith HPTU-50N 1 cost to run per month?
About $13.79 a month at the U.S. average residential rate (18.3¢/kWh) — 45¢ a day, or $165 a year. Your state's rate moves this up or down; see the table above.
Is the A. O. Smith HPTU-50N 1 energy efficient?
It uses 25% less electricity than the median certified electric water heater, placing it in the efficient third of certified models.
What does the A. O. Smith HPTU-50N 1 cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $118 a year in Nevada (13.1¢/kWh) and $476 in Hawaii (52.7¢/kWh).

Keep digging