WattCost

Data through June 2026

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

Rinnai REHP80BM

Heating a typical household's hot water, the Rinnai REHP80BM is certified at 1,225 kWh a year — about $225 at the U.S. average electricity rate, or $18.72 a month. Efficiency-wise it's unremarkable in a good way: within 1% of the median certified electric water heater (rank 273 of 510). Where you live moves the bill from $161 a year in Nevada to $646 in Hawaii.

Dimensions 74.2" H × 25.7" W

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

$225/yr

$125 · cheapest certified water heaters (electric)$319 · priciest
Per month
$18.72
Per day
62¢
Certified use
1,225 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 REHP80BM (▮) sits among all 510 certified water heaters (electric), by annual kWh

What it costs in every state

Rinnai REHP80BM: 1,225 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$201
Alaska28.2¢$346
Arizona15.2¢$186
Arkansas14.1¢$173
California34.7¢$426
Colorado17.1¢$210
Connecticut24.3¢$298
Delaware19.3¢$236
District of Columbia24.4¢$299
Florida15.1¢$185
Georgia16.4¢$200
Hawaiipriciest52.7¢$646
Idaho14.4¢$176
Illinois19.9¢$244
Indiana17.5¢$214
Iowa15.9¢$195
Kansas15.7¢$192
Kentucky14.3¢$175
Louisiana13.5¢$165
Maine29.6¢$362
Maryland21.8¢$268
Massachusetts29.6¢$363
Michigan23.0¢$282
Minnesota17.5¢$215
Mississippi14.9¢$182
Missouri16.2¢$199
Montana15.1¢$185
Nebraska13.3¢$162
Nevadacheapest13.1¢$161
New Hampshire27.0¢$331
New Jersey24.9¢$306
New Mexico15.1¢$184
New York29.5¢$361
North Carolina14.7¢$181
North Dakota14.1¢$173
Ohio19.2¢$235
Oklahoma14.3¢$176
Oregon16.3¢$200
Pennsylvania21.7¢$266
Rhode Island29.2¢$358
South Carolina15.6¢$190
South Dakota15.4¢$188
Tennessee14.1¢$172
Texas15.9¢$195
Utah13.4¢$164
Vermont24.4¢$299
Virginia17.2¢$211
Washington14.9¢$183
West Virginia15.4¢$189
Wisconsin19.6¢$240
Wyoming15.2¢$187

Certified models closest in efficiency

electric water heaters within reach of 1,225 kWh/yr
ModelkWh/yr$/yr (US avg)
Ariston ARIHPWH-65-T1,225$225
Lennox WHHP065T45MD240S1,225$225
Rinnai REHP801,225$225
Rinnai REHP80C1,225$225
Midea CAN3-RSJ-15/300RDVN3-L41,230$226
Midea MAHW-80VN3B1,230$226

Run your own numbers

Your rate, your numbers

Per day
62¢
Per month
$18.72
Per year
$225

1,225 kWh/yr × 18.3¢/kWh = $225/yr

Prefilled with this model's certified 1,225 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 REHP80BM use?
ENERGY STAR certifies the Rinnai REHP80BM at 1,225 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 REHP80BM cost to run per month?
About $18.72 a month at the U.S. average residential rate (18.3¢/kWh) — 62¢ a day, or $225 a year. Your state's rate moves this up or down; see the table above.
Is the Rinnai REHP80BM energy efficient?
It uses 1% more electricity than the median certified electric water heater.
What does the Rinnai REHP80BM 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 $646 in Hawaii (52.7¢/kWh).

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