Staging copy: search engines are asked not to index this deployment. Canonical base for this build: https://keepcold-backup.pages.dev
Size a portable power station for a U.S. household refrigerator or freezer during an outage. The calculator uses your energy figure, a duration you choose, and four published battery claims. It does not test your appliance, and it does not promise the food will stay cold.
Read the estimated yearly kWh on the EnergyGuide label, or use a plug-in meter’s average watts. If you know compressor running watts and a duty cycle, that is a third option. None of those is the startup surge.
Eight, twelve, twenty-four, thirty-six, and forty-eight hours are built in. A custom duration up to one week is allowed. A longer plan needs more watt-hours. It still does not measure temperature.
The four batteries are sorted by whether the published watt-hours cover your plan, smallest sufficient capacity first. If you enter startup watts, a published surge that is too low is called out. Energy fit is not proof the compressor will start.
Only these four models are in the catalog. Figures are owner-provided manufacturer claims recorded November 7, 2026. Where the official page text matched, the card says so. Where the same page disagreed with itself, the card says that too. Prices, stock, ratings, and reviews are not shown because this site does not publish them.
EcoFlow
Spec block matched 1,024 Wh, 1,800 W total, and 3,600 W surge. The same page also describes an X-Boost figure of 2,200 W, which is not the continuous rating used here.
Jackery
A specifications row matched 1,070 Wh, 1,500 W rated, and 3,000 W surge. A description sentence on the same page says 1,024 Wh. This site did not replace 1,070 Wh.
Jackery
Official text matched 2,042 Wh, 2,200 W continuous, and 4,400 W surge. The manufacturer’s refrigerator wording on that page is not a test by this site.
EcoFlow
Official text matched 2,048 Wh, 2,400 W output, and 4,800 W surge. An X-Boost mention of appliances up to 3,400 W is not used as the continuous or surge rating.
There is no wiring, transfer-switch, or backfeed procedure here. Follow the refrigerator manual and the power-station manual. Keep the unit dry, give it the ventilation the manual requires, and do not confuse a battery power station with a fuel generator. Fuel generators do not belong indoors.
Food safety is a temperature question. A runtime estimate is not a thermometer. Start with the outage food-safety page.