WattCost

Data through June 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 $65 at the U.S. average rate, or $5.40 a month, the equivalent of a steady 40-watt draw. Even among certified models it's on the thirsty end: 23% more electricity than the median freezerless-and-single-door refrigerator, ranked 255 of 269. Where you live moves the bill from $46 a year in Nevada to $186 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 18.3¢/kWh

$65/yr

$7.70 · cheapest certified refrigerators$148 · priciest
Per month
$5.40
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 4,371 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
Alabama16.4¢$58
Alaska28.2¢$100
Arizona15.2¢$54
Arkansas14.1¢$50
California34.7¢$123
Colorado17.1¢$60
Connecticut24.3¢$86
Delaware19.3¢$68
District of Columbia24.4¢$86
Florida15.1¢$53
Georgia16.4¢$58
Hawaiipriciest52.7¢$186
Idaho14.4¢$51
Illinois19.9¢$70
Indiana17.5¢$62
Iowa15.9¢$56
Kansas15.7¢$55
Kentucky14.3¢$50
Louisiana13.5¢$48
Maine29.6¢$104
Maryland21.8¢$77
Massachusetts29.6¢$105
Michigan23.0¢$81
Minnesota17.5¢$62
Mississippi14.9¢$53
Missouri16.2¢$57
Montana15.1¢$53
Nebraska13.3¢$47
Nevadacheapest13.1¢$46
New Hampshire27.0¢$95
New Jersey24.9¢$88
New Mexico15.1¢$53
New York29.5¢$104
North Carolina14.7¢$52
North Dakota14.1¢$50
Ohio19.2¢$68
Oklahoma14.3¢$51
Oregon16.3¢$58
Pennsylvania21.7¢$77
Rhode Island29.2¢$103
South Carolina15.6¢$55
South Dakota15.4¢$54
Tennessee14.1¢$50
Texas15.9¢$56
Utah13.4¢$47
Vermont24.4¢$86
Virginia17.2¢$61
Washington14.9¢$53
West Virginia15.4¢$55
Wisconsin19.6¢$69
Wyoming15.2¢$54

Certified models closest in efficiency

freezerless-and-single-door refrigerators within reach of 353 kWh/yr
ModelkWh/yr$/yr (US avg)
Fhiaba S360FR3DU355$65
Fhiaba S360FR6DU355$65
VIKING RANGE,LLC FDREIC7360L355$65
VIKING RANGE,LLC FDREIC7360R355$65
Monogram ZIR361NBR358$66
Monogram ZIR361NPR358$66

Run your own numbers

Your rate, your numbers

Per day
18¢
Per month
$5.40
Per year
$65

353 kWh/yr × 18.3¢/kWh = $65/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 $5.40 a month at the U.S. average residential rate (18.3¢/kWh) — 18¢ a day, or $65 a year. Your state's rate moves this up or down; see the table above.
Is the Sub-Zero DET3650R energy efficient?
It uses 23% 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 $46 a year in Nevada (13.1¢/kWh) and $186 in Hawaii (52.7¢/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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