⚡The Backup Power Guide
Free tool

Fridge Runtime Calculator: How Long Will My Fridge Run on a Power Station?

Enter your fridge’s yearly kWh (from the yellow Energy Guide label) or its average watts, and pick a power station size.

By The Backup Power Guide · Updated October 30, 2026
0Fridge average watts
0Estimated hours
0Estimated days

Math: usable Wh (capacity × 0.85) ÷ (yearly kWh × 1000 ÷ 8760). Real runtime changes with room temperature, door openings and the unit’s idle draw.

Short answer: A typical fridge using about 500 kWh per year averages roughly 57 W, so a 1,000 Wh power station runs it for around 15 hours and a 2,000 Wh unit for around 30 hours, before solar recharging.

Frequently asked questions

How long will a 1000Wh power station run a fridge?

Divide the usable energy by the fridge’s average draw. With about 85% of 1,000 Wh usable and a fridge averaging 60 W (about 1.4 kWh per day), that is roughly 14 hours. Your fridge may use more or less; the Energy Guide label lists yearly kWh, which you can divide by 365.

What is a fridge’s average power draw?

Take the yearly kWh from the Energy Guide sticker, divide by 8,760 hours, and multiply by 1,000. For example, 500 kWh per year is about 57 W on average.

How can I make the fridge run longer on battery?

Keep the door closed, set it a little colder before the outage, fill empty space with water bottles, and recharge the power station with solar panels during the day if you can.

Next: Size a power station for your whole outage list

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