WattCost

Data through April 2026

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

Ruud PROUH50 T0 RU120

Heating a typical household's hot water, the Ruud PROUH50 T0 RU120 is certified at 1,082 kWh a year — about $204 at the U.S. average electricity rate, or $16.98 a month. Efficiency-wise it's unremarkable in a good way: within 0% of the median certified electric water heater (rank 287 of 566). Where you live moves the bill from $134 a year in North Dakota to $504 in Hawaii.

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

$204/yr

$121 · cheapest certified water heaters (electric)$328 · priciest
Per month
$16.98
Per day
56¢
Certified use
1,082 kWh/yr
Type
Hybrid/Electric Heat Pump
Heat pump type
120 Volt Integrated HPWH
Storage volume
46 gal
First-hour rating
51 gal
UEF
3
643 kWh1,741 kWh
Where the Ruud PROUH50 T0 RU120 (▮) sits among all 566 certified water heaters (electric), by annual kWh

What it costs in every state

Ruud PROUH50 T0 RU120: 1,082 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama17.4¢$188
Alaska27.4¢$296
Arizona15.5¢$167
Arkansas14.2¢$153
California35.3¢$381
Colorado16.5¢$179
Connecticut32.2¢$349
Delaware18.8¢$203
District of Columbia25.4¢$275
Florida15.4¢$166
Georgia15.4¢$166
Hawaiipriciest46.6¢$504
Idaho12.7¢$137
Illinois20.5¢$221
Indiana17.9¢$194
Iowa13.9¢$150
Kansas15.8¢$171
Kentucky15.0¢$163
Louisiana14.4¢$156
Maine28.4¢$308
Maryland22.1¢$239
Massachusetts29.4¢$319
Michigan21.4¢$231
Minnesota16.4¢$177
Mississippi16.8¢$181
Missouri14.0¢$152
Montana13.9¢$150
Nebraska13.3¢$144
Nevada14.3¢$155
New Hampshire27.2¢$295
New Jersey23.5¢$255
New Mexico15.2¢$164
New York29.4¢$319
North Carolina16.3¢$176
North Dakotacheapest12.3¢$134
Ohio19.5¢$211
Oklahoma13.3¢$144
Oregon15.8¢$171
Pennsylvania21.5¢$232
Rhode Island28.3¢$306
South Carolina17.1¢$185
South Dakota14.5¢$157
Tennessee14.9¢$162
Texas17.0¢$184
Utah13.3¢$144
Vermont24.6¢$266
Virginia17.4¢$188
Washington14.4¢$155
West Virginia16.1¢$174
Wisconsin19.2¢$208
Wyoming14.7¢$159

Certified models closest in efficiency

electric water heaters within reach of 1,082 kWh/yr
ModelkWh/yr$/yr (US avg)
Friedrich PROH50 T0 FD1201,082$204
Rheem PROPH50 T0 RH1201,082$204
Rheem XE50T10H15U01,082$204
Rheem XE50T10HD00U01,082$204
Richmond 10E50-HP1201,082$204
Friedrich PROH50 T0 FD120-M1,072$202

Run your own numbers

Your rate, your numbers

Per day
56¢
Per month
$16.98
Per year
$204

1,082 kWh/yr × 18.8¢/kWh = $204/yr

Prefilled with this model's certified 1,082 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 Ruud PROUH50 T0 RU120 use?
ENERGY STAR certifies the Ruud PROUH50 T0 RU120 at 1,082 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 Ruud PROUH50 T0 RU120 cost to run per month?
About $16.98 a month at the U.S. average residential rate (18.8¢/kWh) — 56¢ a day, or $204 a year. Your state's rate moves this up or down; see the table above.
Is the Ruud PROUH50 T0 RU120 energy efficient?
It uses 0% less electricity than the median certified electric water heater.
What does the Ruud PROUH50 T0 RU120 cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $134 a year in North Dakota (12.3¢/kWh) and $504 in Hawaii (46.6¢/kWh).

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