WattCost

Data through April 2026

Running cost · Freezers · ENERGY STAR certified

Sub-Zero CL3650F/S

Running around the clock, the Sub-Zero CL3650F/S uses a certified 640 kWh per year — about $121 at the U.S. average rate, or $10.04 a month, the equivalent of a steady 73-watt draw. Even among certified models it's on the thirsty end: 46% more electricity than the median upright freezer, ranked 429 of 431. Where you live moves the bill from $79 a year in North Dakota to $298 in Hawaii.

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

$121/yr

$26 · cheapest certified freezers$122 · priciest
Per month
$10.04
Per day
33¢
Certified use
640 kWh/yr
Configuration
Upright Freezer
Total capacity
20.6 cu ft
Defrost
Automatic
Compact
No
137 kWh649 kWh
Where the Sub-Zero CL3650F/S (▮) sits among all 568 certified freezers, by annual kWh

What it costs in every state

Sub-Zero CL3650F/S: 640 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama17.4¢$111
Alaska27.4¢$175
Arizona15.5¢$99
Arkansas14.2¢$91
California35.3¢$226
Colorado16.5¢$106
Connecticut32.2¢$206
Delaware18.8¢$120
District of Columbia25.4¢$163
Florida15.4¢$98
Georgia15.4¢$98
Hawaiipriciest46.6¢$298
Idaho12.7¢$81
Illinois20.5¢$131
Indiana17.9¢$115
Iowa13.9¢$89
Kansas15.8¢$101
Kentucky15.0¢$96
Louisiana14.4¢$92
Maine28.4¢$182
Maryland22.1¢$141
Massachusetts29.4¢$188
Michigan21.4¢$137
Minnesota16.4¢$105
Mississippi16.8¢$107
Missouri14.0¢$90
Montana13.9¢$89
Nebraska13.3¢$85
Nevada14.3¢$91
New Hampshire27.2¢$174
New Jersey23.5¢$151
New Mexico15.2¢$97
New York29.4¢$188
North Carolina16.3¢$104
North Dakotacheapest12.3¢$79
Ohio19.5¢$125
Oklahoma13.3¢$85
Oregon15.8¢$101
Pennsylvania21.5¢$137
Rhode Island28.3¢$181
South Carolina17.1¢$109
South Dakota14.5¢$93
Tennessee14.9¢$96
Texas17.0¢$109
Utah13.3¢$85
Vermont24.6¢$157
Virginia17.4¢$111
Washington14.4¢$92
West Virginia16.1¢$103
Wisconsin19.2¢$123
Wyoming14.7¢$94

Certified models closest in efficiency

upright freezers within reach of 640 kWh/yr
ModelkWh/yr$/yr (US avg)
Fhiaba S360FZ3IU632$119
Fhiaba S360FZ6IU632$119
VIKING RANGE,LLC FDFZIC7360L632$119
VIKING RANGE,LLC FDFZIC7360R632$119
Monogram ZIF361NBR649$122
Monogram ZIF361NPR649$122

Run your own numbers

Your rate, your numbers

Per day
33¢
Per month
$10.04
Per year
$121

640 kWh/yr × 18.8¢/kWh = $121/yr

Prefilled with this model's certified 640 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.

Questions, answered with the data

How much electricity does the Sub-Zero CL3650F/S use?
ENERGY STAR certifies the Sub-Zero CL3650F/S at 640 kWh per year. The certified annual kWh comes from the DOE test procedure, which measures continuous 24/7 operation at standardized temperatures.
How much does the Sub-Zero CL3650F/S cost to run per month?
About $10.04 a month at the U.S. average residential rate (18.8¢/kWh) — 33¢ a day, or $121 a year. Your state's rate moves this up or down; see the table above.
Is the Sub-Zero CL3650F/S energy efficient?
It uses 46% more electricity than the median certified upright freezer, which puts it among the least efficient certified models.
What does the Sub-Zero CL3650F/S cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $79 a year in North Dakota (12.3¢/kWh) and $298 in Hawaii (46.6¢/kWh).
How many watts does the Sub-Zero CL3650F/S draw on average?
Spread over a year of continuous operation, 640 kWh works out to an average draw of about 73 watts — like leaving a 73-watt bulb on 24/7.

Keep digging