WattCost

Data through April 2026

Running cost · Refrigerators · ENERGY STAR certified

DOMETIC C40S1

The DOMETIC C40S1 never switches off, and its certified 106 kWh a year works out to about $20 on a U.S.-average electric bill — roughly $1.66 a month for an average continuous draw of 12 watts. That puts it in the most efficient tenth of every certified compact refrigerator — 57% less electricity than the median, ranked 1 of 1589. Where you live moves the bill from $13 a year in North Dakota to $49 in Hawaii. It also meets ENERGY STAR's stricter “Most Efficient” criteria.

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

$20/yr

$7.91 · cheapest certified refrigerators$152 · priciest
Per month
$1.66
Per day
5¢
Certified use
106 kWh/yr
Configuration
Compact Refrigerator
Total capacity
1.1 cu ft
Defrost
Automatic
Ice maker
No
Through-door dispenser
No
42 kWh805 kWh
Where the DOMETIC C40S1 (▮) sits among all 4,229 certified refrigerators, by annual kWh

What it costs in every state

DOMETIC C40S1: 106 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama17.4¢$18
Alaska27.4¢$29
Arizona15.5¢$16
Arkansas14.2¢$15
California35.3¢$37
Colorado16.5¢$18
Connecticut32.2¢$34
Delaware18.8¢$20
District of Columbia25.4¢$27
Florida15.4¢$16
Georgia15.4¢$16
Hawaiipriciest46.6¢$49
Idaho12.7¢$13
Illinois20.5¢$22
Indiana17.9¢$19
Iowa13.9¢$15
Kansas15.8¢$17
Kentucky15.0¢$16
Louisiana14.4¢$15
Maine28.4¢$30
Maryland22.1¢$23
Massachusetts29.4¢$31
Michigan21.4¢$23
Minnesota16.4¢$17
Mississippi16.8¢$18
Missouri14.0¢$15
Montana13.9¢$15
Nebraska13.3¢$14
Nevada14.3¢$15
New Hampshire27.2¢$29
New Jersey23.5¢$25
New Mexico15.2¢$16
New York29.4¢$31
North Carolina16.3¢$17
North Dakotacheapest12.3¢$13
Ohio19.5¢$21
Oklahoma13.3¢$14
Oregon15.8¢$17
Pennsylvania21.5¢$23
Rhode Island28.3¢$30
South Carolina17.1¢$18
South Dakota14.5¢$15
Tennessee14.9¢$16
Texas17.0¢$18
Utah13.3¢$14
Vermont24.6¢$26
Virginia17.4¢$18
Washington14.4¢$15
West Virginia16.1¢$17
Wisconsin19.2¢$20
Wyoming14.7¢$16

Certified models closest in efficiency

compact refrigerators within reach of 106 kWh/yr
ModelkWh/yr$/yr (US avg)
DOMETIC C40S2most efficient106$20
Fisher & Paykel RS2435SBmost efficient106$20
Liebherr UR3750most efficient115$22
DOMETIC C60SFS CAREmost efficient124$23
Liebherr UR3650most efficient125$24
Liebherr URP3653most efficient125$24

Run your own numbers

Your rate, your numbers

Per day
5¢
Per month
$1.66
Per year
$20

106 kWh/yr × 18.8¢/kWh = $20/yr

Prefilled with this model's certified 106 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 DOMETIC C40S1 use?
ENERGY STAR certifies the DOMETIC C40S1 at 106 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 DOMETIC C40S1 cost to run per month?
About $1.66 a month at the U.S. average residential rate (18.8¢/kWh) — 5¢ a day, or $20 a year. Your state's rate moves this up or down; see the table above.
Is the DOMETIC C40S1 energy efficient?
It uses 57% 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 DOMETIC C40S1 cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $13 a year in North Dakota (12.3¢/kWh) and $49 in Hawaii (46.6¢/kWh).
How many watts does the DOMETIC C40S1 draw on average?
Spread over a year of continuous operation, 106 kWh works out to an average draw of about 12 watts — like leaving a 12-watt bulb on 24/7.

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