WattCost

Data through April 2026

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

Rinnai REHP65BM

Heating a typical household's hot water, the Rinnai REHP65BM is certified at 1,240 kWh a year — about $233 at the U.S. average electricity rate, or $19.46 a month. Efficiency-wise it's unremarkable in a good way: within 15% of the median certified electric water heater (rank 390 of 566). The same unit costs $153 a year in North Dakota but $578 in Hawaii — electricity rates, not the appliance, make the difference.

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

$233/yr

$121 · cheapest certified water heaters (electric)$328 · priciest
Per month
$19.46
Per day
64¢
Certified use
1,240 kWh/yr
Type
Hybrid/Electric Heat Pump
Heat pump type
240 Volt Integrated HPWH
Storage volume
60 gal
First-hour rating
80 gal
UEF
3.9
643 kWh1,741 kWh
Where the Rinnai REHP65BM (▮) sits among all 566 certified water heaters (electric), by annual kWh

What it costs in every state

Rinnai REHP65BM: 1,240 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama17.4¢$216
Alaska27.4¢$339
Arizona15.5¢$192
Arkansas14.2¢$176
California35.3¢$437
Colorado16.5¢$205
Connecticut32.2¢$400
Delaware18.8¢$233
District of Columbia25.4¢$315
Florida15.4¢$191
Georgia15.4¢$191
Hawaiipriciest46.6¢$578
Idaho12.7¢$157
Illinois20.5¢$254
Indiana17.9¢$222
Iowa13.9¢$172
Kansas15.8¢$196
Kentucky15.0¢$186
Louisiana14.4¢$179
Maine28.4¢$352
Maryland22.1¢$274
Massachusetts29.4¢$365
Michigan21.4¢$265
Minnesota16.4¢$203
Mississippi16.8¢$208
Missouri14.0¢$174
Montana13.9¢$172
Nebraska13.3¢$165
Nevada14.3¢$177
New Hampshire27.2¢$338
New Jersey23.5¢$292
New Mexico15.2¢$188
New York29.4¢$365
North Carolina16.3¢$202
North Dakotacheapest12.3¢$153
Ohio19.5¢$242
Oklahoma13.3¢$165
Oregon15.8¢$196
Pennsylvania21.5¢$266
Rhode Island28.3¢$351
South Carolina17.1¢$212
South Dakota14.5¢$180
Tennessee14.9¢$185
Texas17.0¢$211
Utah13.3¢$165
Vermont24.6¢$305
Virginia17.4¢$216
Washington14.4¢$178
West Virginia16.1¢$199
Wisconsin19.2¢$238
Wyoming14.7¢$182

Certified models closest in efficiency

electric water heaters within reach of 1,240 kWh/yr
ModelkWh/yr$/yr (US avg)
1HVAC ACIQ-80G-HP-WH1,240$233
ACIQ ACIQ-80G-HP-WH1,240$233
Alsetria HPWH - 65G1,240$233
Alsetria HPWH-80G1,240$233
Bosch TR7000T-65US1,240$233
Bosch TR7000T - 80US1,240$233

Run your own numbers

Your rate, your numbers

Per day
64¢
Per month
$19.46
Per year
$233

1,240 kWh/yr × 18.8¢/kWh = $233/yr

Prefilled with this model's certified 1,240 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 REHP65BM use?
ENERGY STAR certifies the Rinnai REHP65BM at 1,240 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 REHP65BM cost to run per month?
About $19.46 a month at the U.S. average residential rate (18.8¢/kWh) — 64¢ a day, or $233 a year. Your state's rate moves this up or down; see the table above.
Is the Rinnai REHP65BM energy efficient?
It uses 15% more electricity than the median certified electric water heater.
What does the Rinnai REHP65BM cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $153 a year in North Dakota (12.3¢/kWh) and $578 in Hawaii (46.6¢/kWh).

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