WattCost

Data through April 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 $117 on a U.S.-average electric bill — roughly $9.74 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 414 of 431) — so the state you live in matters more than usual. Where you live moves the bill from $77 a year in North Dakota to $290 in Hawaii.

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

$117/yr

$26 · cheapest certified freezers$122 · priciest
Per month
$9.74
Per day
32¢
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 568 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
Alabama17.4¢$108
Alaska27.4¢$170
Arizona15.5¢$96
Arkansas14.2¢$88
California35.3¢$219
Colorado16.5¢$103
Connecticut32.2¢$200
Delaware18.8¢$117
District of Columbia25.4¢$158
Florida15.4¢$96
Georgia15.4¢$95
Hawaiipriciest46.6¢$290
Idaho12.7¢$79
Illinois20.5¢$127
Indiana17.9¢$111
Iowa13.9¢$86
Kansas15.8¢$98
Kentucky15.0¢$93
Louisiana14.4¢$90
Maine28.4¢$176
Maryland22.1¢$137
Massachusetts29.4¢$183
Michigan21.4¢$133
Minnesota16.4¢$102
Mississippi16.8¢$104
Missouri14.0¢$87
Montana13.9¢$86
Nebraska13.3¢$82
Nevada14.3¢$89
New Hampshire27.2¢$169
New Jersey23.5¢$146
New Mexico15.2¢$94
New York29.4¢$183
North Carolina16.3¢$101
North Dakotacheapest12.3¢$77
Ohio19.5¢$121
Oklahoma13.3¢$83
Oregon15.8¢$98
Pennsylvania21.5¢$133
Rhode Island28.3¢$176
South Carolina17.1¢$106
South Dakota14.5¢$90
Tennessee14.9¢$93
Texas17.0¢$106
Utah13.3¢$83
Vermont24.6¢$153
Virginia17.4¢$108
Washington14.4¢$89
West Virginia16.1¢$100
Wisconsin19.2¢$119
Wyoming14.7¢$91

Certified models closest in efficiency

upright freezers within reach of 621 kWh/yr
ModelkWh/yr$/yr (US avg)
Bertazzoni REF36FCBIPNP630$119
Elica EC36SLA20IPR630$119
FULGOR MILANO FM6CF36IFBI630$119
FULGOR MILANO FM7CF36IFBI630$119
HALLMAN HRBIAF36PR630$119
HESTAN KRCF36630$119

Run your own numbers

Your rate, your numbers

Per day
32¢
Per month
$9.74
Per year
$117

621 kWh/yr × 18.8¢/kWh = $117/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 $9.74 a month at the U.S. average residential rate (18.8¢/kWh) — 32¢ a day, or $117 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 $77 a year in North Dakota (12.3¢/kWh) and $290 in Hawaii (46.6¢/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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