WattCost

Data through April 2026

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

A. O. Smith HPSN10-66H45DV 2

Heating a typical household's hot water, the A. O. Smith HPSN10-66H45DV 2 is certified at 1,233 kWh a year — about $232 at the U.S. average electricity rate, or $19.35 a month. That's close to the middle of the certified pack — about 14% above the median electric water heater, ranked 348 of 566. The same unit costs $152 a year in North Dakota but $575 in Hawaii — electricity rates, not the appliance, make the difference.

Estimated annual running cost · U.S. average rate 18.8¢/kWh

$232/yr

$121 · cheapest certified water heaters (electric)$328 · priciest
Per month
$19.35
Per day
64¢
Certified use
1,233 kWh/yr
Type
Hybrid/Electric Heat Pump
Heat pump type
240 Volt Integrated HPWH
Storage volume
67 gal
First-hour rating
82 gal
UEF
3.7
643 kWh1,741 kWh
Where the A. O. Smith HPSN10-66H45DV 2 (▮) sits among all 566 certified water heaters (electric), by annual kWh

What it costs in every state

A. O. Smith HPSN10-66H45DV 2: 1,233 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama17.4¢$215
Alaska27.4¢$337
Arizona15.5¢$191
Arkansas14.2¢$175
California35.3¢$435
Colorado16.5¢$204
Connecticut32.2¢$398
Delaware18.8¢$232
District of Columbia25.4¢$313
Florida15.4¢$190
Georgia15.4¢$190
Hawaiipriciest46.6¢$575
Idaho12.7¢$157
Illinois20.5¢$252
Indiana17.9¢$221
Iowa13.9¢$171
Kansas15.8¢$195
Kentucky15.0¢$185
Louisiana14.4¢$178
Maine28.4¢$350
Maryland22.1¢$272
Massachusetts29.4¢$363
Michigan21.4¢$264
Minnesota16.4¢$202
Mississippi16.8¢$207
Missouri14.0¢$173
Montana13.9¢$171
Nebraska13.3¢$164
Nevada14.3¢$176
New Hampshire27.2¢$336
New Jersey23.5¢$290
New Mexico15.2¢$187
New York29.4¢$363
North Carolina16.3¢$200
North Dakotacheapest12.3¢$152
Ohio19.5¢$240
Oklahoma13.3¢$164
Oregon15.8¢$195
Pennsylvania21.5¢$265
Rhode Island28.3¢$349
South Carolina17.1¢$210
South Dakota14.5¢$179
Tennessee14.9¢$184
Texas17.0¢$209
Utah13.3¢$164
Vermont24.6¢$303
Virginia17.4¢$214
Washington14.4¢$177
West Virginia16.1¢$198
Wisconsin19.2¢$237
Wyoming14.7¢$181

Certified models closest in efficiency

electric water heaters within reach of 1,233 kWh/yr
ModelkWh/yr$/yr (US avg)
A. O. Smith HPS10-66H45DV 21,233$232
A. O. Smith HPTS-66 21,233$232
American HPS10266H045DV 21,233$232
GREE GRS-3.0Pd/TD70GANhA-D1,233$232
Lochinvar HPSA065KD 21,233$232
RELIANCE WATER HEATERS 10-66-DHPTS 21,233$232

Run your own numbers

Your rate, your numbers

Per day
64¢
Per month
$19.35
Per year
$232

1,233 kWh/yr × 18.8¢/kWh = $232/yr

Prefilled with this model's certified 1,233 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 HPSN10-66H45DV 2 use?
ENERGY STAR certifies the A. O. Smith HPSN10-66H45DV 2 at 1,233 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 HPSN10-66H45DV 2 cost to run per month?
About $19.35 a month at the U.S. average residential rate (18.8¢/kWh) — 64¢ a day, or $232 a year. Your state's rate moves this up or down; see the table above.
Is the A. O. Smith HPSN10-66H45DV 2 energy efficient?
It uses 14% more electricity than the median certified electric water heater.
What does the A. O. Smith HPSN10-66H45DV 2 cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $152 a year in North Dakota (12.3¢/kWh) and $575 in Hawaii (46.6¢/kWh).

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