A typical full-size refrigerator draws about 150 watts while the compressor runs (roughly 100-250 W) and uses around 1.2-1.9 kWh a day. Expect a brief starting surge of up to about 2,200 watts.
- Running watts
- 150 WTypical; 100–250 W across models
- Starting watts
- 2,200 WGenerator makers' charts list about 2,200 W for the compressor…
- Per day
- 1.45 kWh24 h of use, cycling
- Current
- 1.2 AAt 120 V while running
Figures checked against DOE, ENERGY STAR and manufacturer data on . Your model's label is the final word.
Watts by model and setting
Most refrigerator models draw between 100 and 250 W while running; a typical one draws about 150 W. ENERGY STAR listings for 25 cu ft models range from about 425 kWh/yr (top freezer) to 600-700 kWh/yr (bottom freezer), or roughly 1.2-1.9 kWh a day; 150 W x 24 h x 0.4 duty cycle is about 1.45 kWh/day (~530 kWh/yr). Defrost heaters and door openings add to this.
- Size and style: bottom-freezer, side-by-side and French-door models with ice makers use more than top-freezer models
- Age: refrigerators over 15 years old use noticeably more energy than ENERGY STAR models
- Automatic defrost heaters and through-the-door ice and water add load
- Room temperature, door openings and thermostat setting change how often the compressor runs
- Inverter (variable-speed) compressors run longer at lower wattage and start more gently
Running a refrigerator on a generator or power station
- Generator: at least 150 running watts and 2,350 starting watts (running plus the 2,200 W start surge, the cautious way to size it). Check both numbers on the spec sheet. A generator rated 3,000 W or more covers it with room to spare.
- Power station: continuous output of at least 150 W and a surge rating that covers about 2,200 W. Pure sine wave output is the safe choice for motors and electronics.
| Power station capacity | Estimated runtime |
|---|---|
| 500 Wh | 7.1 h |
| 1,000 Wh | 14.2 h |
| 2,000 Wh | 28.3 h |
| 3,000 Wh | 42.5 h |
Based on 60 W average draw (running watts × duty cycle) and 85% usable capacity.
- Size the generator or power station for the starting surge, not just the 150 W running draw; a 2,000 W+ inverter generator or a power station with a high surge rating is a safe bet
- A power station with pure sine wave output is recommended for compressor motors and electronic controls
- A fridge does not need power nonstop: running it a few hours at a time and keeping the door shut holds food safe while saving fuel or battery
- Run a gas generator outdoors only, at least 20 feet from doors, windows and vents; carbon monoxide from generators kills. Connect appliances with heavy-duty extension cords or a professionally installed transfer switch, never by backfeeding.
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Questions people ask
Can a 1000 watt power station run a refrigerator?
Often yes for running watts, but only if its surge rating covers the compressor start. Check the fridge's label and the power station's peak rating; a 1 kWh battery runs a typical fridge for most of a day.
How many amps does a refrigerator use?
Most full-size fridges draw about 1-2 amps at 120 V while running, with a momentary spike at startup. Manufacturers usually recommend a dedicated 15 or 20 amp circuit.
How long will a fridge stay cold without power?
About 4 hours with the door closed, according to food-safety guidance; a full freezer holds about 48 hours.
Sources
- ENERGY STAR certified product: Kenmore 25.0 cu ft top-freezer refrigerator (425 kWh/yr)
- ENERGY STAR certified product: Maytag 25.2 cu ft bottom-freezer refrigerator (615 kWh/yr)
- ENERGY STAR: Refrigerators
- Honda Power Equipment: Generators guide with appliance wattage chart (PDF)
- Champion Power Equipment: Generator wattage chart (PDF)
- OPPD (Omaha Public Power District): Appliance guide (PDF)