Fridge and freezer backup

Estimate how long a power station can cover a fridge or freezer.

Use running watts, duty cycle, surge, battery watt-hours, and outage length to compare practical power station sizes.

Estimated runtime 16.2 hours

A 1000Wh class station may cover a short fridge outage.

Inputs

Appliance and battery

Running watts Use measured watts or the appliance label as a starting point. Duty cycle 35% means the compressor runs about 21 minutes per hour. Startup surge watts Check the power station surge rating before buying. Power station capacity Use the listed watt-hours, such as 500Wh, 1000Wh, or 2000Wh. Usable battery percent Accounts for inverter losses, reserve, and real-world headroom. Outage target Used to estimate the battery size needed for your goal.

Why this is only an estimate

Refrigerators and freezers cycle on and off. Room temperature, door openings, food load, age, and compressor behavior can change runtime. Use a plug-in watt meter when the purchase depends on the number.

Fridge and freezer guides

Plan around runtime, surge, and recharge

Guide

Power station size for a refrigerator

Understand the checks that matter before relying on a battery during an outage.

Read guide

Freezer

Garage freezer outage backup

See why freezer runtime depends on load, temperature, and compressor cycling.

Read guide

Planning

Outage backup load planner

Add fridge or freezer backup to the rest of your outage load list.

Open planner