WattCost

Data through June 2026

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

Rinnai REHP80W

Heating a typical household's hot water, the Rinnai REHP80W is certified at 1,230 kWh a year — about $226 at the U.S. average electricity rate, or $18.80 a month. That's close to the middle of the certified pack — about 2% above the median electric water heater, ranked 280 of 510. Where you live moves the bill from $161 a year in Nevada to $648 in Hawaii.

Dimensions 41.7" H × 21.8" W

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

$226/yr

$125 · cheapest certified water heaters (electric)$319 · priciest
Per month
$18.80
Per day
62¢
Certified use
1,230 kWh/yr
Type
Hybrid/Electric Heat Pump
Heat pump type
240 Volt Integrated HPWH
Storage volume
75 gal
First-hour rating
91 gal
UEF
4
681 kWh1,741 kWh
Where the Rinnai REHP80W (▮) sits among all 510 certified water heaters (electric), by annual kWh

What it costs in every state

Rinnai REHP80W: 1,230 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$202
Alaska28.2¢$347
Arizona15.2¢$187
Arkansas14.1¢$174
California34.7¢$427
Colorado17.1¢$211
Connecticut24.3¢$299
Delaware19.3¢$237
District of Columbia24.4¢$300
Florida15.1¢$186
Georgia16.4¢$201
Hawaiipriciest52.7¢$648
Idaho14.4¢$177
Illinois19.9¢$245
Indiana17.5¢$215
Iowa15.9¢$196
Kansas15.7¢$193
Kentucky14.3¢$175
Louisiana13.5¢$166
Maine29.6¢$364
Maryland21.8¢$269
Massachusetts29.6¢$364
Michigan23.0¢$283
Minnesota17.5¢$215
Mississippi14.9¢$183
Missouri16.2¢$200
Montana15.1¢$186
Nebraska13.3¢$163
Nevadacheapest13.1¢$161
New Hampshire27.0¢$332
New Jersey24.9¢$307
New Mexico15.1¢$185
New York29.5¢$363
North Carolina14.7¢$181
North Dakota14.1¢$174
Ohio19.2¢$236
Oklahoma14.3¢$176
Oregon16.3¢$201
Pennsylvania21.7¢$267
Rhode Island29.2¢$360
South Carolina15.6¢$191
South Dakota15.4¢$189
Tennessee14.1¢$173
Texas15.9¢$196
Utah13.4¢$164
Vermont24.4¢$301
Virginia17.2¢$212
Washington14.9¢$183
West Virginia15.4¢$190
Wisconsin19.6¢$241
Wyoming15.2¢$187

Certified models closest in efficiency

electric water heaters within reach of 1,230 kWh/yr
ModelkWh/yr$/yr (US avg)
Midea CAN3-RSJ-15/300RDVN3-L41,230$226
Midea MAHW-80VN3B1,230$226
Midea MCHW-80VN3B1,230$226
Midea US3-RSJ-15/300RDVN3-L41,230$226
Rinnai REHP80CW1,230$226
A. O. Smith HPS10-66H45DV 21,233$226

Run your own numbers

Your rate, your numbers

Per day
62¢
Per month
$18.80
Per year
$226

1,230 kWh/yr × 18.3¢/kWh = $226/yr

Prefilled with this model's certified 1,230 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 Rinnai REHP80W use?
ENERGY STAR certifies the Rinnai REHP80W at 1,230 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 Rinnai REHP80W cost to run per month?
About $18.80 a month at the U.S. average residential rate (18.3¢/kWh) — 62¢ a day, or $226 a year. Your state's rate moves this up or down; see the table above.
Is the Rinnai REHP80W energy efficient?
It uses 2% more electricity than the median certified electric water heater.
What does the Rinnai REHP80W cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $161 a year in Nevada (13.1¢/kWh) and $648 in Hawaii (52.7¢/kWh).

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