Fridge and Freezer in a Power Outage: How Long Food Stays Safe

How long food stays safe

The official answers, if the doors stay closed:

Every time you open a door, the inside warms up and those times get shorter ⁷.

What to keep and what to throw out

• Fridge: after 4 hours or more without power, throw out all perishable food, including meat, poultry, fish, eggs and leftovers ¹. Québec says to sort the food after an outage of more than six hours, and to throw out completely thawed perishables exposed to temperatures above 4 °C ³.
• Room temperature: throw away any food that has been at room temperature for 2 hours or more ².
• Freezer: thawed perishables go too ¹. Health Canada says food that still contains ice crystals or feels refrigerator-cold can be refrozen ². Ohio State Extension is stricter for vegetables: only if they still have ice crystals and the freezer is at 40 °F or below ⁷.
• Safe temperatures: a fridge at or below 4 °C (40 °F), a freezer at or below −18 °C (0 °F) ². A thermometer is the only way to know.

When in doubt, throw it out, as FEMA’s power outage sheet puts it ¹¹.

Keeping the fridge and freezer running

A fridge does not run nonstop: its compressor cycles on and off. What matters for a battery is its energy per day.

• Fridge-freezer: the median full-size ENERGY STAR model uses 478 kWh a year ⁴, about 1.3 kWh a day or 55 W on average.
• Chest freezer: the 9 certified chest models from 9 to 21.7 cu ft use up to 346 kWh a year ¹², under 1 kWh a day.
• Your own: the yearly kWh on your EnergyGuide (US) or EnerGuide (Canada) label, divided by 365, gives your daily use.

Four stations from our catalogue:

How we got these: capacity × 85 % usable ^5,6 ÷ (average load + what the station uses on its own: about 10 W published for both BLUETTI stations ^8,14, 20 W assumed for the others). Loads: 55 W for the fridge, 95 W with a chest freezer at 40 W. Small loads can do worse than 85 % ⁶.

Set the station up for a fridge. A fridge cycles, so a station may see it as idle and cut it:

• BLUETTI Elite 200 V2: ECO mode is on by default; BLUETTI says to disable it for refrigerators ⁸. On the Elite 100 V2 it is off by default ¹⁴.
• EcoFlow DELTA 3 Plus: set the AC timeout to “never” in the app; EcoFlow warns about intermittent loads like fridges ⁹.
• Anker SOLIX C1000 Gen 2: the default standby time is 12 hours, adjustable in the Anker app ¹³; set the longest time.

A fridge’s compressor also draws more for a moment as it starts. A 16 cu ft frost-free fridge is rated 725 W on its nameplate ¹⁵; all four stations above are rated 1,800 W or more continuous ^8,9,13,14. Stock changes fast: on 2026-11-10 the DELTA 3 Plus was out of stock in Canada and on pre-order in the US.

Small tricks that buy you hours

• Keep the doors shut: if you can, wait until the power is back before opening the freezer ⁷.
• Fill the freezer: a full freezer holds about twice as long as a half-full one ¹.
• Know if it thawed while you were away: keep two or three ice cubes sealed in a freezer bag; if they melted, the freezer went above 32 °F ⁷. Skip the coin-in-a-cup trick, which NC State Extension calls risky ¹⁰.
• Dry ice: Ohio State Extension says 50 pounds can protect a full 20 cu ft freezer for three to four days; it is extremely cold and must not touch skin ⁷.

For the numbers behind your own fridge, see how many watts a refrigerator uses, or add it to the power station calculator. Our method is on the how we research page.