What will actually keep your fridge running when the power goes out?

Every specification here is linked to the document it came from, and every runtime is calculated in front of you. Swap in your own refrigerator's wattage and the numbers still work.

Start with the number that matters

Capacity in watt-hours is the headline figure, but it is not what you get. The inverter loses roughly 15% converting stored DC into household AC, so a 1,070 Wh unit delivers about 910 Wh in practice. Then it depends entirely on what you plug in — and on duty cycle, because a refrigerator's compressor only runs about a third of the time.

Every runtime on this site comes out of those two lines. Work through our full runtime reference to see 20 common household loads calculated against each unit.

The three units we cover

All three are LiFePO4, all three are in the 1,000–1,200 Wh class, and all three will run the essentials through a typical outage. They differ in weight, recharge behavior and how far they expand.

Answering the actual question

• Will one of these run my refrigerator, and for how long? — the most common question, worked through properly including compressor surge.
• Backing up a CPAP — the strongest case for battery backup, and the humidifier trap that ruins the math.
• How to size a unit for your household — build your own load list rather than guessing.
• Solar vs a gas generator — an honest comparison, including where gas still wins outright.
• The runtime reference — 20 loads × 3 units, calculated.

We read the spec sheets properly, and they don't always agree with themselves

Checking these three units against their manufacturers' own documentation turned up contradictions in two of them. BLUETTI's AC180 page gives the weight as 35.3 lb in the spec card and 37 lb in the product description. EcoFlow advertises "3000+ cycles" in its marketing copy while the spec table on the same page says 4,000. Jackery's headline "1 hour" recharge is a special mode, not the default 1.7-hour wall charge.

None of those is a scandal, but all three change what you are actually buying, and every one of them is sitting in plain sight on the manufacturer's own page. We print both figures and tell you which we used. That, plus arithmetic you can check, is the whole method — written out on our methodology page.