WattCost

Data through June 2026

Running cost · Refrigerators · ENERGY STAR certified

Sub-Zero CL3650U**/S

The Sub-Zero CL3650U**/S never switches off, and its certified 596 kWh a year works out to about $109 on a U.S.-average electric bill — roughly $9.11 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 942 of 1478). Where you live moves the bill from $78 a year in Nevada to $314 in Hawaii.

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
$9.11
Per day
30¢
Certified use
596 kWh/yr
Configuration
Bottom Freezer
Total capacity
20.8 cu ft
Defrost
Automatic
Ice maker
Yes
Through-door dispenser
No
42 kWh805 kWh
Where the Sub-Zero CL3650U**/S (▮) sits among all 4,371 certified refrigerators, by annual kWh

What it costs in every state

Sub-Zero CL3650U**/S: 596 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$98
Alaska28.2¢$168
Arizona15.2¢$90
Arkansas14.1¢$84
California34.7¢$207
Colorado17.1¢$102
Connecticut24.3¢$145
Delaware19.3¢$115
District of Columbia24.4¢$145
Florida15.1¢$90
Georgia16.4¢$98
Hawaiipriciest52.7¢$314
Idaho14.4¢$86
Illinois19.9¢$119
Indiana17.5¢$104
Iowa15.9¢$95
Kansas15.7¢$94
Kentucky14.3¢$85
Louisiana13.5¢$80
Maine29.6¢$176
Maryland21.8¢$130
Massachusetts29.6¢$176
Michigan23.0¢$137
Minnesota17.5¢$104
Mississippi14.9¢$89
Missouri16.2¢$97
Montana15.1¢$90
Nebraska13.3¢$79
Nevadacheapest13.1¢$78
New Hampshire27.0¢$161
New Jersey24.9¢$149
New Mexico15.1¢$90
New York29.5¢$176
North Carolina14.7¢$88
North Dakota14.1¢$84
Ohio19.2¢$114
Oklahoma14.3¢$85
Oregon16.3¢$97
Pennsylvania21.7¢$130
Rhode Island29.2¢$174
South Carolina15.6¢$93
South Dakota15.4¢$92
Tennessee14.1¢$84
Texas15.9¢$95
Utah13.4¢$80
Vermont24.4¢$146
Virginia17.2¢$103
Washington14.9¢$89
West Virginia15.4¢$92
Wisconsin19.6¢$117
Wyoming15.2¢$91

Certified models closest in efficiency

bottom-freezer refrigerators within reach of 596 kWh/yr
ModelkWh/yr$/yr (US avg)
Cafe CWE23SP*M596$109
Frigidaire GRMG2272C596$109
GE GWE23GEN596$109
GE GWE23GMN596$109
GE GWE23GYN596$109
GE Profile PWE23KEL596$109

Run your own numbers

Your rate, your numbers

Per day
30¢
Per month
$9.11
Per year
$109

596 kWh/yr × 18.3¢/kWh = $109/yr

Prefilled with this model's certified 596 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 CL3650U**/S use?
ENERGY STAR certifies the Sub-Zero CL3650U**/S at 596 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 CL3650U**/S cost to run per month?
About $9.11 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 CL3650U**/S energy efficient?
It uses 6% more electricity than the median certified bottom-freezer refrigerator.
What does the Sub-Zero CL3650U**/S 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 $314 in Hawaii (52.7¢/kWh).
How many watts does the Sub-Zero CL3650U**/S draw on average?
Spread over a year of continuous operation, 596 kWh works out to an average draw of about 68 watts — like leaving a 68-watt bulb on 24/7.

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