WattCost

Data through April 2026

Running cost · Freezers · ENERGY STAR certified

Sub-Zero ID-30FI

The Sub-Zero ID-30FI never switches off, and its certified 399 kWh a year works out to about $75 on a U.S.-average electric bill — roughly $6.26 a month for an average continuous draw of 46 watts. It sits near the bottom of the certified table — using 63% more than the median compact freezer (rank 128 of 128) — so the state you live in matters more than usual. The same unit costs $49 a year in North Dakota but $186 in Hawaii — electricity rates, not the appliance, make the difference.

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

$75/yr

$26 · cheapest certified freezers$122 · priciest
Per month
$6.26
Per day
21¢
Certified use
399 kWh/yr
Configuration
Compact
Total capacity
5.1 cu ft
Defrost
Automatic
Compact
Yes
137 kWh649 kWh
Where the Sub-Zero ID-30FI (▮) sits among all 568 certified freezers, by annual kWh

What it costs in every state

Sub-Zero ID-30FI: 399 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama17.4¢$69
Alaska27.4¢$109
Arizona15.5¢$62
Arkansas14.2¢$56
California35.3¢$141
Colorado16.5¢$66
Connecticut32.2¢$129
Delaware18.8¢$75
District of Columbia25.4¢$101
Florida15.4¢$61
Georgia15.4¢$61
Hawaiipriciest46.6¢$186
Idaho12.7¢$51
Illinois20.5¢$82
Indiana17.9¢$71
Iowa13.9¢$55
Kansas15.8¢$63
Kentucky15.0¢$60
Louisiana14.4¢$58
Maine28.4¢$113
Maryland22.1¢$88
Massachusetts29.4¢$118
Michigan21.4¢$85
Minnesota16.4¢$65
Mississippi16.8¢$67
Missouri14.0¢$56
Montana13.9¢$55
Nebraska13.3¢$53
Nevada14.3¢$57
New Hampshire27.2¢$109
New Jersey23.5¢$94
New Mexico15.2¢$60
New York29.4¢$118
North Carolina16.3¢$65
North Dakotacheapest12.3¢$49
Ohio19.5¢$78
Oklahoma13.3¢$53
Oregon15.8¢$63
Pennsylvania21.5¢$86
Rhode Island28.3¢$113
South Carolina17.1¢$68
South Dakota14.5¢$58
Tennessee14.9¢$60
Texas17.0¢$68
Utah13.3¢$53
Vermont24.6¢$98
Virginia17.4¢$69
Washington14.4¢$57
West Virginia16.1¢$64
Wisconsin19.2¢$77
Wyoming14.7¢$59

Certified models closest in efficiency

compact freezers within reach of 399 kWh/yr
ModelkWh/yr$/yr (US avg)
U-Line 1224FZRA390$73
U-Line FZ124390$73
U-Line UHFZ124-BS01B390$73
U-Line UHFZ124-IS01B390$73
U-Line UHFZ124-SS01B390$73
U-Line UHFZ124-WS01B390$73

Run your own numbers

Your rate, your numbers

Per day
21¢
Per month
$6.26
Per year
$75

399 kWh/yr × 18.8¢/kWh = $75/yr

Prefilled with this model's certified 399 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 ID-30FI use?
ENERGY STAR certifies the Sub-Zero ID-30FI at 399 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 ID-30FI cost to run per month?
About $6.26 a month at the U.S. average residential rate (18.8¢/kWh) — 21¢ a day, or $75 a year. Your state's rate moves this up or down; see the table above.
Is the Sub-Zero ID-30FI energy efficient?
It uses 63% more electricity than the median certified compact freezer, which puts it among the least efficient certified models.
What does the Sub-Zero ID-30FI cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $49 a year in North Dakota (12.3¢/kWh) and $186 in Hawaii (46.6¢/kWh).
How many watts does the Sub-Zero ID-30FI draw on average?
Spread over a year of continuous operation, 399 kWh works out to an average draw of about 46 watts — like leaving a 46-watt bulb on 24/7.

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