WattCost

Data through June 2026

Running cost · Refrigerators · ENERGY STAR certified

MicroFridge 3.1MF7RW

The MicroFridge 3.1MF7RW never switches off, and its certified 195 kWh a year works out to about $36 on a U.S.-average electric bill — roughly $2.98 a month for an average continuous draw of 22 watts. Only a handful of certified compact refrigerators do better: it ranks 64 of 1645 and undercuts the median by 21%. The same unit costs $26 a year in Nevada but $103 in Hawaii — electricity rates, not the appliance, make the difference. It also meets ENERGY STAR's stricter “Most Efficient” criteria.

Uses 46% less energy than the U.S. federal minimum

Dimensions 32.9" H × 18.5" W

Estimated annual running cost · U.S. average rate 18.3¢/kWh

$36/yr

$7.70 · cheapest certified refrigerators$148 · priciest
Per month
$2.98
Per day
10¢
Certified use
195 kWh/yr
Configuration
Compact Refrigerator
Total capacity
3.1 cu ft
Defrost
Automatic
Ice maker
No
Through-door dispenser
No
42 kWh805 kWh
Where the MicroFridge 3.1MF7RW (▮) sits among all 4,371 certified refrigerators, by annual kWh

What it costs in every state

MicroFridge 3.1MF7RW: 195 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama16.4¢$32
Alaska28.2¢$55
Arizona15.2¢$30
Arkansas14.1¢$28
California34.7¢$68
Colorado17.1¢$33
Connecticut24.3¢$47
Delaware19.3¢$38
District of Columbia24.4¢$48
Florida15.1¢$29
Georgia16.4¢$32
Hawaiipriciest52.7¢$103
Idaho14.4¢$28
Illinois19.9¢$39
Indiana17.5¢$34
Iowa15.9¢$31
Kansas15.7¢$31
Kentucky14.3¢$28
Louisiana13.5¢$26
Maine29.6¢$58
Maryland21.8¢$43
Massachusetts29.6¢$58
Michigan23.0¢$45
Minnesota17.5¢$34
Mississippi14.9¢$29
Missouri16.2¢$32
Montana15.1¢$30
Nebraska13.3¢$26
Nevadacheapest13.1¢$26
New Hampshire27.0¢$53
New Jersey24.9¢$49
New Mexico15.1¢$29
New York29.5¢$58
North Carolina14.7¢$29
North Dakota14.1¢$28
Ohio19.2¢$37
Oklahoma14.3¢$28
Oregon16.3¢$32
Pennsylvania21.7¢$42
Rhode Island29.2¢$57
South Carolina15.6¢$30
South Dakota15.4¢$30
Tennessee14.1¢$27
Texas15.9¢$31
Utah13.4¢$26
Vermont24.4¢$48
Virginia17.2¢$34
Washington14.9¢$29
West Virginia15.4¢$30
Wisconsin19.6¢$38
Wyoming15.2¢$30

Certified models closest in efficiency

compact refrigerators within reach of 195 kWh/yr
ModelkWh/yr$/yr (US avg)
Danby DAG022A5BDHmost efficient195$36
Danby One Plug 3.1SM6Rmost efficient195$36
MicroFridge 3.1MF7Rmost efficient195$36
MicroFridge 3.1MF7RSmost efficient195$36
FRIGIAIRE EFR331197$36
Frigidaire EFR323197$36

Run your own numbers

Your rate, your numbers

Per day
10¢
Per month
$2.98
Per year
$36

195 kWh/yr × 18.3¢/kWh = $36/yr

Prefilled with this model's certified 195 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 MicroFridge 3.1MF7RW use?
ENERGY STAR certifies the MicroFridge 3.1MF7RW at 195 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 MicroFridge 3.1MF7RW cost to run per month?
About $2.98 a month at the U.S. average residential rate (18.3¢/kWh) — 10¢ a day, or $36 a year. Your state's rate moves this up or down; see the table above.
Is the MicroFridge 3.1MF7RW energy efficient?
It uses 21% less electricity than the median certified compact refrigerator, placing it in the top 10% of certified models. It also meets ENERGY STAR's Most Efficient criteria.
What does the MicroFridge 3.1MF7RW cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $26 a year in Nevada (13.1¢/kWh) and $103 in Hawaii (52.7¢/kWh).
How many watts does the MicroFridge 3.1MF7RW draw on average?
Spread over a year of continuous operation, 195 kWh works out to an average draw of about 22 watts — like leaving a 22-watt bulb on 24/7.

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