Best portable power stations for keeping a fridge running during an outage
Ranked by exactly one metric: calculated fridge runtime — how long each of the 30 models in our database keeps a refrigerator cold on a single charge, computed from the manufacturer's published capacity with our standard formula. This is not a hands-on review and nothing here was bench-tested. It is a ranking of arithmetic, with the assumptions printed below so you can re-run it with your own fridge's numbers.
Data as of Oct 19, 2026 (data verified Oct 2026). Specs: manufacturer product pages and manuals, per the data rules on how we calculate.
The load being ranked (assumptions, with grades):
• The fridge draws 150 W while its compressor runs, and the compressor runs 40% of the time — a 60 W average draw. The duty cycle is a WattLong planning assumption, INFERRED; it is the same default our fridge runtime calculator uses, and the calculator lets you change it.
• Runtime = capacity (Wh) × 0.85 ÷ 60 W. The 0.85 is the inverter-efficiency factor in Bluetti's own published runtime formula, REPORTED.
• Base battery only. Several models below accept expansion batteries that multiply these hours; expansions are excluded so the table compares the units as they ship. Manufacturer-rated maximum capacities are noted where they exist.
• Runtime is only half the question — the station also has to start the compressor. A fridge start can demand up to about 2,200 additional watts for a split second (figures on our wattage chart); every surge rating in this table is 3,500 W or higher, so all eight clear that bar on paper.
The ranking: top 8 of 30 by fridge runtime
| # | Model | Capacity | Continuous | Surge | Weight | Fridge runtime | ≈ Days |
|---|---|---|---|---|---|---|---|
| 1 | EcoFlow DELTA Pro Ultra | 6,144 Wh | 7,200 W | 10,800 W | 181.8 lb | 87.0 h | 3.6 |
| 2 | EcoFlow DELTA Pro 3 | 4,096 Wh | 4,000 W | 8,000 W | 113.5 lb | 58.0 h | 2.4 |
| 3 | Anker SOLIX F3800 | 3,840 Wh | 6,000 W | 9,000 W | 132.3 lb | 54.4 h | 2.3 |
| 4 | EcoFlow DELTA Pro | 3,600 Wh | 3,600 W | 7,200 W | 99 lb | 51.0 h | 2.1 |
| 5 | Goal Zero Yeti 3000X | 3,032 Wh | 2,000 W | 3,500 W | 69.78 lb | 43.0 h | 1.8 |
| 6 | Jackery Explorer 3000 Pro | 3,024 Wh | 3,000 W | 6,000 W | 63.93 lb | 42.8 h | 1.8 |
| 7 | Bluetti Apex 300 | 2,764.8 Wh | 3,840 W | 7,680 W | 83.78 lb | 39.2 h | 1.6 |
| 8 | Bluetti AC300 + B300K | 2,764.8 Wh | 3,000 W | 6,000 W | — | 39.2 h | 1.6 |
Ranks 7 and 8 are a genuine tie: identical capacity (2,764.8 Wh) produces identical calculated runtime. They are ordered by continuous rating. The AC300 + B300K's weight is shown as — because our database does not carry a verified figure for that configuration; we omit fields we cannot verify rather than estimate them. Full specs for all 30 models, including the 22 that didn't make this table, are on the models page.
How to read this table before you shop
The top of this ranking is home-backup equipment, not camping gear. The DELTA Pro Ultra keeps a fridge cold for a calculated 87 hours — about 3.6 days — and weighs 181.8 lb doing it. Every model in the top four weighs 99 lb or more. These are "wheel it into place before the storm" units. If the plan is to carry the station to the fridge when the lights go out, the honest cut-off in this table is around rank 6.
Two of the eight are not LFP. The Goal Zero Yeti 3000X and Jackery Explorer 3000 Pro use Li-ion NMC batteries. That is not a safety verdict — it is an ownership-arithmetic one: their manufacturer cycle-life ratings (500 cycles to 80% for the Yeti 3000X; 2,000 cycles to 70% for the Explorer 3000 Pro) are far below the 3,000–6,000-cycle ratings of the LFP models around them. For a unit that sits in a closet waiting for outages, that may never matter. For one that cycles daily, it decides the ranking more than 0.2 hours of runtime does.
Expansion batteries would rewrite the table — that's why they're excluded, and why you shouldn't ignore them. The DELTA Pro Ultra is rated to 30,720 Wh maximum capacity with expansion, the Apex 300 to 19,354 Wh, the F3800 to 26,880 Wh. If you are willing to buy the extra batteries, the ranking by maximum capacity is a different table; the runtime calculator has the expansion toggle for exactly that comparison.
Solar input is the other way this table flips. Over a multi-day outage, a mid-size station recharging from panels every day can outlast a bigger station running on its first charge alone. Runtime-per-charge is the right metric for overnight and weekend outages; for anything longer, run the solar charging calculator alongside this table.
Your fridge is not our fridge. A large or older refrigerator, a hot garage, or frequent door openings all raise the duty cycle above 40%, and runtime falls in proportion — at a 60% duty cycle every figure in the table drops by a third. The fridge runtime calculator runs all 30 models against your own duty cycle and fridge size, with an optional 10% reserve if you'd rather plan pessimistically.
Below the cut
The strongest of the remaining 22 models (the ~2 kWh class) calculates to roughly 29–31 hours of fridge runtime — a full day plus margin, in a unit one person can carry. For most single-night and next-day-restoration outages, that is the practical sweet spot, and it is why the three ~1 kWh stations in our head-to-head comparison (14.5–17.9 hours) are better read as "overnight insurance" than as multi-day backup. The full database, with every model's figures, is on the models page.
WattLong is reader-supported. Some links on this site are affiliate links: if you buy through them, we may earn a commission at no extra cost to you. See our affiliate disclosure. All results are estimates — verify with the manufacturer and a licensed electrician before relying on them.