WattCost

Data through April 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 $112 on a U.S.-average electric bill — roughly $9.31 a month for an average continuous draw of 68 watts. Efficiency-wise it's unremarkable in a good way: within 6% of the median certified bottom-freezer refrigerator (rank 921 of 1458). The same unit costs $73 a year in North Dakota but $276 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 18.8¢/kWh

$112/yr

$7.91 · cheapest certified refrigerators$152 · priciest
Per month
$9.31
Per day
31¢
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 4,229 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
Alabama17.4¢$103
Alaska27.4¢$162
Arizona15.5¢$92
Arkansas14.2¢$84
California35.3¢$209
Colorado16.5¢$98
Connecticut32.2¢$191
Delaware18.8¢$111
District of Columbia25.4¢$151
Florida15.4¢$91
Georgia15.4¢$91
Hawaiipriciest46.6¢$276
Idaho12.7¢$75
Illinois20.5¢$121
Indiana17.9¢$106
Iowa13.9¢$82
Kansas15.8¢$94
Kentucky15.0¢$89
Louisiana14.4¢$86
Maine28.4¢$169
Maryland22.1¢$131
Massachusetts29.4¢$175
Michigan21.4¢$127
Minnesota16.4¢$97
Mississippi16.8¢$99
Missouri14.0¢$83
Montana13.9¢$82
Nebraska13.3¢$79
Nevada14.3¢$85
New Hampshire27.2¢$162
New Jersey23.5¢$140
New Mexico15.2¢$90
New York29.4¢$175
North Carolina16.3¢$96
North Dakotacheapest12.3¢$73
Ohio19.5¢$116
Oklahoma13.3¢$79
Oregon15.8¢$94
Pennsylvania21.5¢$127
Rhode Island28.3¢$168
South Carolina17.1¢$101
South Dakota14.5¢$86
Tennessee14.9¢$89
Texas17.0¢$101
Utah13.3¢$79
Vermont24.6¢$146
Virginia17.4¢$103
Washington14.4¢$85
West Virginia16.1¢$95
Wisconsin19.2¢$114
Wyoming14.7¢$87

Certified models closest in efficiency

bottom-freezer refrigerators within reach of 593 kWh/yr
ModelkWh/yr$/yr (US avg)
Gaggenau RVB497790595$112
Miele KFMC 3642 L595$112
Miele KFMC 3642 R595$112
Avanti FFFD22IWR3S590$111
Cafe CWE23SP*M596$112
COSMO COS-FDR223GWSS590$111

Run your own numbers

Your rate, your numbers

Per day
31¢
Per month
$9.31
Per year
$112

593 kWh/yr × 18.8¢/kWh = $112/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 $9.31 a month at the U.S. average residential rate (18.8¢/kWh) — 31¢ a day, or $112 a year. Your state's rate moves this up or down; see the table above.
Is the Sub-Zero DET3650CI energy efficient?
It uses 6% 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 $73 a year in North Dakota (12.3¢/kWh) and $276 in Hawaii (46.6¢/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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