WattCost

Data through June 2026

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

Rheem PROPH80 T2 RH400-SO

Heating a typical household's hot water, the Rheem PROPH80 T2 RH400-SO is certified at 1,213 kWh a year — about $222 at the U.S. average electricity rate, or $18.54 a month. That's close to the middle of the certified pack — about 0% above the median electric water heater, ranked 263 of 510. Where you live moves the bill from $159 a year in Nevada to $639 in Hawaii.

Dimensions 74.2" H × 24.3" W

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

$222/yr

$125 · cheapest certified water heaters (electric)$319 · priciest
Per month
$18.54
Per day
61¢
Certified use
1,213 kWh/yr
Type
Hybrid/Electric Heat Pump
Heat pump type
240 Volt Integrated HPWH
Storage volume
72 gal
First-hour rating
87 gal
UEF
4.07
681 kWh1,741 kWh
Where the Rheem PROPH80 T2 RH400-SO (▮) sits among all 510 certified water heaters (electric), by annual kWh

What it costs in every state

Rheem PROPH80 T2 RH400-SO: 1,213 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$199
Alaska28.2¢$342
Arizona15.2¢$184
Arkansas14.1¢$171
California34.7¢$421
Colorado17.1¢$208
Connecticut24.3¢$295
Delaware19.3¢$234
District of Columbia24.4¢$296
Florida15.1¢$183
Georgia16.4¢$198
Hawaiipriciest52.7¢$639
Idaho14.4¢$174
Illinois19.9¢$241
Indiana17.5¢$212
Iowa15.9¢$193
Kansas15.7¢$191
Kentucky14.3¢$173
Louisiana13.5¢$164
Maine29.6¢$359
Maryland21.8¢$265
Massachusetts29.6¢$359
Michigan23.0¢$279
Minnesota17.5¢$213
Mississippi14.9¢$180
Missouri16.2¢$197
Montana15.1¢$184
Nebraska13.3¢$161
Nevadacheapest13.1¢$159
New Hampshire27.0¢$328
New Jersey24.9¢$303
New Mexico15.1¢$183
New York29.5¢$358
North Carolina14.7¢$179
North Dakota14.1¢$171
Ohio19.2¢$233
Oklahoma14.3¢$174
Oregon16.3¢$198
Pennsylvania21.7¢$264
Rhode Island29.2¢$355
South Carolina15.6¢$189
South Dakota15.4¢$186
Tennessee14.1¢$171
Texas15.9¢$193
Utah13.4¢$162
Vermont24.4¢$296
Virginia17.2¢$209
Washington14.9¢$181
West Virginia15.4¢$187
Wisconsin19.6¢$237
Wyoming15.2¢$185

Certified models closest in efficiency

electric water heaters within reach of 1,213 kWh/yr
ModelkWh/yr$/yr (US avg)
Friedrich PROH80 T2 FD400-301,213$222
Friedrich PROH80 T2 FD400-SO1,213$222
Rheem PROPH80 T2 RH400-301,213$222
Rheem XE80T10H45U11,213$222
Rheem XE80T10HS45U11,213$222
Richmond 10E80-HP5U301,213$222

Run your own numbers

Your rate, your numbers

Per day
61¢
Per month
$18.54
Per year
$222

1,213 kWh/yr × 18.3¢/kWh = $222/yr

Prefilled with this model's certified 1,213 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 Rheem PROPH80 T2 RH400-SO use?
ENERGY STAR certifies the Rheem PROPH80 T2 RH400-SO at 1,213 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 Rheem PROPH80 T2 RH400-SO cost to run per month?
About $18.54 a month at the U.S. average residential rate (18.3¢/kWh) — 61¢ a day, or $222 a year. Your state's rate moves this up or down; see the table above.
Is the Rheem PROPH80 T2 RH400-SO energy efficient?
It uses 0% more electricity than the median certified electric water heater.
What does the Rheem PROPH80 T2 RH400-SO cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $159 a year in Nevada (13.1¢/kWh) and $639 in Hawaii (52.7¢/kWh).

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