Device wattage guides
How Many Watts Does a Refrigerator Use?
A refrigerator is often one of the first loads people plan for during an outage. Most modern full-size refrigerators draw modest running watts once the compressor is on, but startup surge and cycling behavior matter when sizing a generator, UPS, or portable power station.
Typical wattage ranges
| Load | Watts | Planning note |
|---|---|---|
| Modern full-size refrigerator | 100-250 W running | Average draw varies as the compressor cycles, door openings, room temperature, and age change the load. |
| Older or less efficient refrigerator | 200-500 W running | Older units may use more energy and can have a higher compressor startup surge. |
| Startup surge | 600-1,200 W brief surge | The surge lasts only a moment, but your backup source must be able to start the compressor. |
Runtime example
With a 1000 Wh battery, a 150 W load, 85% efficiency, and a 15% reserve, the planning estimate is about about 4.8 hours of compressor-on equivalent time.
Because refrigerators cycle on and off, real clock time may be longer than the simple continuous-load estimate.
Planning tips
- Use the nameplate or an energy monitor when possible; refrigerator loads vary a lot by model and age.
- Plan for compressor surge, not just running watts, when choosing a generator or inverter.
- Keep the doors closed during an outage to reduce run time and preserve cold air.
- If using a power station, compare watt-hours and surge rating separately.
Safety and limits
- Do not run a fuel-powered generator indoors, in a garage, or near open windows.
- Use properly rated cords and transfer equipment for home circuits.
- Food safety depends on temperature and time; use a thermometer rather than assuming backup runtime is enough.
FAQ
Can a portable power station run a refrigerator?
Often yes, if it has enough surge capacity to start the compressor and enough watt-hours for the runtime you need.
Why is refrigerator runtime hard to estimate?
The compressor cycles instead of running continuously, so room temperature, door openings, and thermostat settings change the actual clock time.
Should I size backup power by running watts or surge watts?
Use both. Running watts help estimate runtime, while surge watts determine whether the backup source can start the refrigerator.