Backup scenario · 1,500Wh starting point
Refrigerator outage backup runtime calculator
Plan portable power station capacity for a refrigerator during a short outage. Change any input to match the equipment label and the power station you are considering.
Backup power runtime
Estimate steady-load runtime after inverter losses and a safety reserve.
Runtime = capacity × efficiency × usable battery share ÷ average load. Motor surge, temperature, battery age and device cycling can change real-world runtime.
Plan for load, surge and outage duration.
The prefilled 1,500Wh battery is a planning starting point for about 8 hours of compressor cycling. It is not a universal product requirement.
Continuous and startup power
This estimate uses 120W as the average load. Check that the inverter can also support approximately 1200W of short-duration demand before buying or connecting equipment.
Important check
Refrigerator wattage varies while the compressor cycles. Confirm both the average load and startup surge with the appliance label or a watt meter.
Quick answers
Refrigerator backup power questions
How long will a 1,500Wh power station run a refrigerator?
At a 120W average load, 85% system efficiency and a 10% battery reserve, the planning estimate is about 9.6 hours. Real runtime depends on the measured load and battery condition.
What power station size is a reasonable starting point for a refrigerator?
1,500Wh is the starting capacity used here for about 8 hours of compressor cycling. Increase capacity for longer outages, additional devices, cold temperatures or battery aging.
Does the inverter output matter for a refrigerator?
Yes. The power station must support the 120W planning load and roughly 1200W of possible short-duration demand. Confirm the equipment label and both continuous and surge output before connecting it.