WattCost

Data through April 2026

Running cost · Refrigerators · ENERGY STAR certified

Sub-Zero ID-30C

The Sub-Zero ID-30C never switches off, and its certified 374 kWh a year works out to about $70 on a U.S.-average electric bill — roughly $5.87 a month for an average continuous draw of 43 watts. It sits near the bottom of the certified table — using 52% more than the median compact refrigerator (rank 1561 of 1589) — so the state you live in matters more than usual. The same unit costs $46 a year in North Dakota but $174 in Hawaii — electricity rates, not the appliance, make the difference.

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

Dimensions 34.5" H × 30" W

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

$70/yr

$7.91 · cheapest certified refrigerators$152 · priciest
Per month
$5.87
Per day
19¢
Certified use
374 kWh/yr
Configuration
Compact Refrigerator
Total capacity
5 cu ft
Defrost
Automatic
Ice maker
No
Through-door dispenser
No
42 kWh805 kWh
Where the Sub-Zero ID-30C (▮) sits among all 4,229 certified refrigerators, by annual kWh

What it costs in every state

Sub-Zero ID-30C: 374 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama17.4¢$65
Alaska27.4¢$102
Arizona15.5¢$58
Arkansas14.2¢$53
California35.3¢$132
Colorado16.5¢$62
Connecticut32.2¢$121
Delaware18.8¢$70
District of Columbia25.4¢$95
Florida15.4¢$58
Georgia15.4¢$57
Hawaiipriciest46.6¢$174
Idaho12.7¢$47
Illinois20.5¢$77
Indiana17.9¢$67
Iowa13.9¢$52
Kansas15.8¢$59
Kentucky15.0¢$56
Louisiana14.4¢$54
Maine28.4¢$106
Maryland22.1¢$83
Massachusetts29.4¢$110
Michigan21.4¢$80
Minnesota16.4¢$61
Mississippi16.8¢$63
Missouri14.0¢$52
Montana13.9¢$52
Nebraska13.3¢$50
Nevada14.3¢$53
New Hampshire27.2¢$102
New Jersey23.5¢$88
New Mexico15.2¢$57
New York29.4¢$110
North Carolina16.3¢$61
North Dakotacheapest12.3¢$46
Ohio19.5¢$73
Oklahoma13.3¢$50
Oregon15.8¢$59
Pennsylvania21.5¢$80
Rhode Island28.3¢$106
South Carolina17.1¢$64
South Dakota14.5¢$54
Tennessee14.9¢$56
Texas17.0¢$64
Utah13.3¢$50
Vermont24.6¢$92
Virginia17.4¢$65
Washington14.4¢$54
West Virginia16.1¢$60
Wisconsin19.2¢$72
Wyoming14.7¢$55

Certified models closest in efficiency

compact refrigerators within reach of 374 kWh/yr
ModelkWh/yr$/yr (US avg)
Lynx LN24REFC386$73
Marvel MLRF*24-IS*1A386$73
Marvel MLRF*24-SS*1A386$73
Marvel MORF*24-SS*1A386$73
Marvel MPRF*24-IS*1A386$73
Marvel MPRF*24-SS*1A386$73

Run your own numbers

Your rate, your numbers

Per day
19¢
Per month
$5.87
Per year
$70

374 kWh/yr × 18.8¢/kWh = $70/yr

Prefilled with this model's certified 374 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 ID-30C use?
ENERGY STAR certifies the Sub-Zero ID-30C at 374 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 ID-30C cost to run per month?
About $5.87 a month at the U.S. average residential rate (18.8¢/kWh) — 19¢ a day, or $70 a year. Your state's rate moves this up or down; see the table above.
Is the Sub-Zero ID-30C energy efficient?
It uses 52% more electricity than the median certified compact refrigerator, which puts it among the least efficient certified models.
What does the Sub-Zero ID-30C cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $46 a year in North Dakota (12.3¢/kWh) and $174 in Hawaii (46.6¢/kWh).
How many watts does the Sub-Zero ID-30C draw on average?
Spread over a year of continuous operation, 374 kWh works out to an average draw of about 43 watts — like leaving a 43-watt bulb on 24/7.

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