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Mini fridge Runtime Estimate

Small fridges vary widely by insulation, room temperature, and door openings. The 45% duty-cycle default is a conservative planning assumption for cycling behavior, not a measured guarantee; measure with a watt meter when possible.

Use this load in the runtime calculator

Planning wattage range

50-100 W. Use a measured average when the device matters.

Planning default

75 W at 45% duty cycle, or about 34 W average load.

Confidence label

Estimated. Treat the result as a planning estimate, not a lab measurement.

1,024 Wh example

With 85% efficiency and a 10% reserve, about 783 Wh remains usable. At the default load, that is roughly 23h 13m.

Evidence behind these load values

Published device values and editorial calculator assumptions have different evidence. An editorial range is a starting input, not a measured category range; replace it with your device reading. Context links explain units or compatibility and do not prove the numbers. The check date records the evidence classification, not a new hardware test.

Evidence type
Source-reported range · Editorial planning default
Source type
Editorial · Official
Confidence
Estimated
Conditions
Room temperature, door openings, insulation, and stabilization after setup can change cycling. The 45% duty cycle remains an editorial planning assumption.
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Evidence behind these load values
ValueEvidence typeConditionsSource and datesConfidence
Startup surgeUnknownUnknown
  • Operating state: Unknown
  • Output path: Unknown
  • Measurement interval: Unknown
No separately attributed sourceSource date: UnknownChecked:
unknown
Planning wattage range50-100 WSource-reported range
  • Operating state: Cycling
  • Output path: AC
  • Measurement interval: Unknown
EnergySage mini-fridge wattage noteSource date: UnknownChecked:
estimated
Planning default75 WEditorial planning default
  • Operating state: Cycling
  • Output path: AC
  • Measurement interval: Unknown
No separately attributed sourceSource date: UnknownChecked:
estimated
Duty cycle45%Editorial planning default
  • Operating state: Cycling
  • Output path: AC
  • Measurement interval: Unknown
No separately attributed sourceSource date: UnknownChecked:
estimated

Device measurement guide

Use the measured average

Enter a steady watt reading or a full-cycle average in the runtime calculator. Use 100% duty cycle for an average that already includes on and off periods.

Device wattage (W)
Read watts after a steady load settles; record energy over time for a cycling load.
Duty cycle (%)
Average watts calculated from Wh divided by hours already include off-cycle time, so do not apply duty cycle again.
How to Measure Device Watts for Runtime Planning
Use this load in the runtime calculator

Verify your watts

  • Check the device label for running watts or input amps and volts.
  • Use a plug-in watt meter for AC loads when the result matters.
  • For cycling loads, measure long enough to capture on/off behavior.
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Check output path

  • AC inverter loads usually lose more energy than direct DC loads.
  • Keep reserve for cold weather, battery age, and load changes.
  • Do not treat label capacity as fully usable watt-hours.
Read the method

Check surge and output

  • Runtime does not prove a station can start a compressor or motor.
  • Compare device startup watts with the station surge rating.
  • Compare running watts with the station continuous output rating.
Check startup surge

How to use this scenario

  • Start with 75 W if you do not have a watt-meter reading yet.
  • Mini fridge is treated as a cycling load at 45% duty cycle, so the calculator averages the running watts over time.
  • Keep at least a planning reserve because battery age, temperature, output path, and device settings can move the result.

Watch-outs

  • The scenario wattage is an estimate. Measure the real load before relying on it for outage, travel, or critical planning.
  • Cycling devices can run longer or shorter depending on ambient temperature, thermostat settings, insulation, and door openings.
  • Runtime does not prove the station can start or safely run the load. Check continuous output and startup surge before trusting a station.

Sources

Use this load in the runtime calculatorCheck source wattage rangesFind a practical power station sizeCompare runtime by battery capacityCheck startup surge

Related Scenarios

Compare nearby loads before assuming one wattage profile covers your setup.