WattCost

Data through April 2026

Running cost · Refrigerators · ENERGY STAR certified

Sub-Zero DET3650R

Running around the clock, the Sub-Zero DET3650R uses a certified 353 kWh per year — about $66 at the U.S. average rate, or $5.54 a month, the equivalent of a steady 40-watt draw. Even among certified models it's on the thirsty end: 22% more electricity than the median freezerless-and-single-door refrigerator, ranked 245 of 259. Where you live moves the bill from $44 a year in North Dakota to $165 in Hawaii.

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

Dimensions 84" H × 36" W

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

$66/yr

$7.91 · cheapest certified refrigerators$152 · priciest
Per month
$5.54
Per day
18¢
Certified use
353 kWh/yr
Configuration
Freezerless and Single Door
Total capacity
20.4 cu ft
Defrost
Automatic
Ice maker
No
Through-door dispenser
No
42 kWh805 kWh
Where the Sub-Zero DET3650R (▮) sits among all 4,229 certified refrigerators, by annual kWh

What it costs in every state

Sub-Zero DET3650R: 353 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama17.4¢$61
Alaska27.4¢$97
Arizona15.5¢$55
Arkansas14.2¢$50
California35.3¢$124
Colorado16.5¢$58
Connecticut32.2¢$114
Delaware18.8¢$66
District of Columbia25.4¢$90
Florida15.4¢$54
Georgia15.4¢$54
Hawaiipriciest46.6¢$165
Idaho12.7¢$45
Illinois20.5¢$72
Indiana17.9¢$63
Iowa13.9¢$49
Kansas15.8¢$56
Kentucky15.0¢$53
Louisiana14.4¢$51
Maine28.4¢$100
Maryland22.1¢$78
Massachusetts29.4¢$104
Michigan21.4¢$76
Minnesota16.4¢$58
Mississippi16.8¢$59
Missouri14.0¢$49
Montana13.9¢$49
Nebraska13.3¢$47
Nevada14.3¢$50
New Hampshire27.2¢$96
New Jersey23.5¢$83
New Mexico15.2¢$53
New York29.4¢$104
North Carolina16.3¢$57
North Dakotacheapest12.3¢$44
Ohio19.5¢$69
Oklahoma13.3¢$47
Oregon15.8¢$56
Pennsylvania21.5¢$76
Rhode Island28.3¢$100
South Carolina17.1¢$60
South Dakota14.5¢$51
Tennessee14.9¢$53
Texas17.0¢$60
Utah13.3¢$47
Vermont24.6¢$87
Virginia17.4¢$61
Washington14.4¢$51
West Virginia16.1¢$57
Wisconsin19.2¢$68
Wyoming14.7¢$52

Certified models closest in efficiency

freezerless-and-single-door refrigerators within reach of 353 kWh/yr
ModelkWh/yr$/yr (US avg)
Fhiaba S360FR3DU355$67
Fhiaba S360FR6DU355$67
VIKING RANGE,LLC FDREIC7360L355$67
VIKING RANGE,LLC FDREIC7360R355$67
Monogram ZIR361NBR358$67
Monogram ZIR361NPR358$67

Run your own numbers

Your rate, your numbers

Per day
18¢
Per month
$5.54
Per year
$66

353 kWh/yr × 18.8¢/kWh = $66/yr

Prefilled with this model's certified 353 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 DET3650R use?
ENERGY STAR certifies the Sub-Zero DET3650R at 353 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 DET3650R cost to run per month?
About $5.54 a month at the U.S. average residential rate (18.8¢/kWh) — 18¢ a day, or $66 a year. Your state's rate moves this up or down; see the table above.
Is the Sub-Zero DET3650R energy efficient?
It uses 22% more electricity than the median certified freezerless-and-single-door refrigerator, which puts it among the least efficient certified models.
What does the Sub-Zero DET3650R cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $44 a year in North Dakota (12.3¢/kWh) and $165 in Hawaii (46.6¢/kWh).
How many watts does the Sub-Zero DET3650R draw on average?
Spread over a year of continuous operation, 353 kWh works out to an average draw of about 40 watts — like leaving a 40-watt bulb on 24/7.

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