WattCost

Data through June 2026

Running cost · Freezers · ENERGY STAR certified

Sub-Zero DEC3650FI

The Sub-Zero DEC3650FI never switches off, and its certified 621 kWh a year works out to about $114 on a U.S.-average electric bill — roughly $9.49 a month for an average continuous draw of 71 watts. It sits near the bottom of the certified table — using 42% more than the median upright freezer (rank 434 of 451) — so the state you live in matters more than usual. Where you live moves the bill from $81 a year in Nevada to $327 in Hawaii.

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

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

$114/yr

$25 · cheapest certified freezers$119 · priciest
Per month
$9.49
Per day
31¢
Certified use
621 kWh/yr
Configuration
Upright Freezer
Total capacity
19.4 cu ft
Defrost
Automatic
Compact
No
137 kWh649 kWh
Where the Sub-Zero DEC3650FI (▮) sits among all 594 certified freezers, by annual kWh

What it costs in every state

Sub-Zero DEC3650FI: 621 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$102
Alaska28.2¢$175
Arizona15.2¢$94
Arkansas14.1¢$88
California34.7¢$216
Colorado17.1¢$106
Connecticut24.3¢$151
Delaware19.3¢$120
District of Columbia24.4¢$151
Florida15.1¢$94
Georgia16.4¢$102
Hawaiipriciest52.7¢$327
Idaho14.4¢$89
Illinois19.9¢$124
Indiana17.5¢$109
Iowa15.9¢$99
Kansas15.7¢$98
Kentucky14.3¢$89
Louisiana13.5¢$84
Maine29.6¢$184
Maryland21.8¢$136
Massachusetts29.6¢$184
Michigan23.0¢$143
Minnesota17.5¢$109
Mississippi14.9¢$92
Missouri16.2¢$101
Montana15.1¢$94
Nebraska13.3¢$82
Nevadacheapest13.1¢$81
New Hampshire27.0¢$168
New Jersey24.9¢$155
New Mexico15.1¢$94
New York29.5¢$183
North Carolina14.7¢$92
North Dakota14.1¢$88
Ohio19.2¢$119
Oklahoma14.3¢$89
Oregon16.3¢$101
Pennsylvania21.7¢$135
Rhode Island29.2¢$182
South Carolina15.6¢$97
South Dakota15.4¢$95
Tennessee14.1¢$87
Texas15.9¢$99
Utah13.4¢$83
Vermont24.4¢$152
Virginia17.2¢$107
Washington14.9¢$93
West Virginia15.4¢$96
Wisconsin19.6¢$121
Wyoming15.2¢$95

Certified models closest in efficiency

upright freezers within reach of 621 kWh/yr
ModelkWh/yr$/yr (US avg)
Bertazzoni REF36FCBIPNP630$116
Elica EC36SLA20IPR630$116
FULGOR MILANO FM6CF36IFBI630$116
FULGOR MILANO FM7CF36IFBI630$116
HALLMAN HRBIAF36PR630$116
HESTAN KRCF36630$116

Run your own numbers

Your rate, your numbers

Per day
31¢
Per month
$9.49
Per year
$114

621 kWh/yr × 18.3¢/kWh = $114/yr

Prefilled with this model's certified 621 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 DEC3650FI use?
ENERGY STAR certifies the Sub-Zero DEC3650FI at 621 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 DEC3650FI cost to run per month?
About $9.49 a month at the U.S. average residential rate (18.3¢/kWh) — 31¢ a day, or $114 a year. Your state's rate moves this up or down; see the table above.
Is the Sub-Zero DEC3650FI energy efficient?
It uses 42% more electricity than the median certified upright freezer, which puts it among the least efficient certified models.
What does the Sub-Zero DEC3650FI cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $81 a year in Nevada (13.1¢/kWh) and $327 in Hawaii (52.7¢/kWh).
How many watts does the Sub-Zero DEC3650FI draw on average?
Spread over a year of continuous operation, 621 kWh works out to an average draw of about 71 watts — like leaving a 71-watt bulb on 24/7.

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