WattCost

Data through June 2026

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

Richmond 10E40-HP120MS

For a standard household draw pattern, the Richmond 10E40-HP120MS uses a certified 780 kWh per year: roughly $143 annually at the national average rate. That puts it in the most efficient tenth of every certified electric water heater — 36% less electricity than the median, ranked 12 of 510. The same unit costs $102 a year in Nevada but $411 in Hawaii — electricity rates, not the appliance, make the difference.

Dimensions 62.3" H × 20.3" W

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

$143/yr

$125 · cheapest certified water heaters (electric)$319 · priciest
Per month
$11.92
Per day
39¢
Certified use
780 kWh/yr
Type
Hybrid/Electric Heat Pump
Heat pump type
120 Volt Integrated HPWH
Storage volume
36 gal
First-hour rating
45 gal
UEF
2.8
681 kWh1,741 kWh
Where the Richmond 10E40-HP120MS (▮) sits among all 510 certified water heaters (electric), by annual kWh

What it costs in every state

Richmond 10E40-HP120MS: 780 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$128
Alaska28.2¢$220
Arizona15.2¢$118
Arkansas14.1¢$110
California34.7¢$271
Colorado17.1¢$134
Connecticut24.3¢$190
Delaware19.3¢$150
District of Columbia24.4¢$190
Florida15.1¢$118
Georgia16.4¢$128
Hawaiipriciest52.7¢$411
Idaho14.4¢$112
Illinois19.9¢$155
Indiana17.5¢$137
Iowa15.9¢$124
Kansas15.7¢$123
Kentucky14.3¢$111
Louisiana13.5¢$105
Maine29.6¢$231
Maryland21.8¢$170
Massachusetts29.6¢$231
Michigan23.0¢$179
Minnesota17.5¢$137
Mississippi14.9¢$116
Missouri16.2¢$127
Montana15.1¢$118
Nebraska13.3¢$103
Nevadacheapest13.1¢$102
New Hampshire27.0¢$211
New Jersey24.9¢$195
New Mexico15.1¢$117
New York29.5¢$230
North Carolina14.7¢$115
North Dakota14.1¢$110
Ohio19.2¢$150
Oklahoma14.3¢$112
Oregon16.3¢$127
Pennsylvania21.7¢$169
Rhode Island29.2¢$228
South Carolina15.6¢$121
South Dakota15.4¢$120
Tennessee14.1¢$110
Texas15.9¢$124
Utah13.4¢$104
Vermont24.4¢$191
Virginia17.2¢$134
Washington14.9¢$116
West Virginia15.4¢$121
Wisconsin19.6¢$153
Wyoming15.2¢$119

Certified models closest in efficiency

electric water heaters within reach of 780 kWh/yr
ModelkWh/yr$/yr (US avg)
Friedrich PROH40 T0 FD120-M780$143
Friedrich PROH40 T0 FD120-MSO780$143
Rheem PROPH40 T0 RH120-M780$143
Rheem PROPH40 T0 RH120-MSO780$143
Rheem XE40T10HM00U0780$143
Rheem XE40T10HMS00U0780$143

Run your own numbers

Your rate, your numbers

Per day
39¢
Per month
$11.92
Per year
$143

780 kWh/yr × 18.3¢/kWh = $143/yr

Prefilled with this model's certified 780 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 Richmond 10E40-HP120MS use?
ENERGY STAR certifies the Richmond 10E40-HP120MS at 780 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 Richmond 10E40-HP120MS cost to run per month?
About $11.92 a month at the U.S. average residential rate (18.3¢/kWh) — 39¢ a day, or $143 a year. Your state's rate moves this up or down; see the table above.
Is the Richmond 10E40-HP120MS energy efficient?
It uses 36% less electricity than the median certified electric water heater, placing it in the top 10% of certified models.
What does the Richmond 10E40-HP120MS cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $102 a year in Nevada (13.1¢/kWh) and $411 in Hawaii (52.7¢/kWh).

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