WattCost

Data through June 2026

Running cost · Refrigerators · ENERGY STAR certified

Sub-Zero DET3650CI

The Sub-Zero DET3650CI never switches off, and its certified 593 kWh a year works out to about $109 on a U.S.-average electric bill — roughly $9.06 a month for an average continuous draw of 68 watts. Efficiency-wise it's unremarkable in a good way: within 5% of the median certified bottom-freezer refrigerator (rank 926 of 1478). The same unit costs $78 a year in Nevada but $313 in Hawaii — electricity rates, not the appliance, make the difference.

Uses 10% less energy than the U.S. federal minimum

Dimensions 84" H × 36" W

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

$109/yr

$7.70 · cheapest certified refrigerators$148 · priciest
Per month
$9.06
Per day
30¢
Certified use
593 kWh/yr
Configuration
Bottom Freezer
Total capacity
19.6 cu ft
Defrost
Automatic
Ice maker
Yes
Through-door dispenser
No
42 kWh805 kWh
Where the Sub-Zero DET3650CI (▮) sits among all 4,371 certified refrigerators, by annual kWh

What it costs in every state

Sub-Zero DET3650CI: 593 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$97
Alaska28.2¢$167
Arizona15.2¢$90
Arkansas14.1¢$84
California34.7¢$206
Colorado17.1¢$102
Connecticut24.3¢$144
Delaware19.3¢$114
District of Columbia24.4¢$145
Florida15.1¢$90
Georgia16.4¢$97
Hawaiipriciest52.7¢$313
Idaho14.4¢$85
Illinois19.9¢$118
Indiana17.5¢$104
Iowa15.9¢$94
Kansas15.7¢$93
Kentucky14.3¢$85
Louisiana13.5¢$80
Maine29.6¢$175
Maryland21.8¢$130
Massachusetts29.6¢$176
Michigan23.0¢$136
Minnesota17.5¢$104
Mississippi14.9¢$88
Missouri16.2¢$96
Montana15.1¢$90
Nebraska13.3¢$79
Nevadacheapest13.1¢$78
New Hampshire27.0¢$160
New Jersey24.9¢$148
New Mexico15.1¢$89
New York29.5¢$175
North Carolina14.7¢$87
North Dakota14.1¢$84
Ohio19.2¢$114
Oklahoma14.3¢$85
Oregon16.3¢$97
Pennsylvania21.7¢$129
Rhode Island29.2¢$173
South Carolina15.6¢$92
South Dakota15.4¢$91
Tennessee14.1¢$83
Texas15.9¢$95
Utah13.4¢$79
Vermont24.4¢$145
Virginia17.2¢$102
Washington14.9¢$88
West Virginia15.4¢$92
Wisconsin19.6¢$116
Wyoming15.2¢$90

Certified models closest in efficiency

bottom-freezer refrigerators within reach of 593 kWh/yr
ModelkWh/yr$/yr (US avg)
Gaggenau RVB497790595$109
Miele KFMC 3642 L595$109
Miele KFMC 3642 R595$109
Avanti FFFD22IWR3S590$108
Cafe CWE23SP*M596$109
COSMO COS-FDR223GWSS590$108

Run your own numbers

Your rate, your numbers

Per day
30¢
Per month
$9.06
Per year
$109

593 kWh/yr × 18.3¢/kWh = $109/yr

Prefilled with this model's certified 593 kWh/yr — adjust if your usage differs from the DOE test basis. The certified annual kWh comes from the DOE test procedure, which measures continuous 24/7 operation at standardized temperatures — refrigerators never get a day off.

Questions, answered with the data

How much electricity does the Sub-Zero DET3650CI use?
ENERGY STAR certifies the Sub-Zero DET3650CI at 593 kWh per year. The certified annual kWh comes from the DOE test procedure, which measures continuous 24/7 operation at standardized temperatures — refrigerators never get a day off.
How much does the Sub-Zero DET3650CI cost to run per month?
About $9.06 a month at the U.S. average residential rate (18.3¢/kWh) — 30¢ a day, or $109 a year. Your state's rate moves this up or down; see the table above.
Is the Sub-Zero DET3650CI energy efficient?
It uses 5% more electricity than the median certified bottom-freezer refrigerator.
What does the Sub-Zero DET3650CI cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $78 a year in Nevada (13.1¢/kWh) and $313 in Hawaii (52.7¢/kWh).
How many watts does the Sub-Zero DET3650CI draw on average?
Spread over a year of continuous operation, 593 kWh works out to an average draw of about 68 watts — like leaving a 68-watt bulb on 24/7.

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