The right power station for refrigerator backup needs two numbers to line up: enough battery (watt hours) to cover the hours you want, and an inverter whose surge rating can start the compressor. For many full size kitchen fridges, a practical target is about 1,500W or more of continuous output (our rule of thumb, leaving headroom for surge and other loads) and roughly 1,000Wh to 2,000Wh of battery for about a day of runtime. Below we show the math, how to read your fridge’s EnergyGuide label, and what the stations we carry can realistically deliver.
Fridge wattage: running watts, surge watts and daily energy
A refrigerator does not pull a steady load. Three numbers matter, and they come from different places.
- Running watts. What the compressor draws while it is on. Anker SOLIX’s sizing guide puts most modern full size refrigerators at about 300W to 800W while the compressor runs. Your appliance tag may list amps and volts; multiplying them gives a rough running figure.
- Starting surge. The brief spike when the compressor kicks on. Anker gives the example of a fridge that runs at 500W needing 1,200W to 2,000W or more for a moment. If the station’s surge rating is too low, the fridge may not start at all.
- Daily energy. Because the compressor cycles on and off, total watt hours per day matters more than running watts for runtime. Anker cites 1,000Wh to 2,000Wh per day as common for a modern ENERGY STAR refrigerator.
Size also matters. ENERGY STAR notes that larger refrigerators generally use more energy, top freezer models tend to use the least, and certified models are about 9 percent more efficient than ones that just meet the federal minimum.
Surge rating vs continuous rating
Every station lists a continuous (rated) output and a surge or peak output. The continuous number must cover the fridge’s running watts plus anything else on the same station. The surge number must cover the compressor start. A fridge that runs fine for hours can still trip an undersized inverter at startup, so check both.
How to read the EnergyGuide label and convert it to average watts
The yellow EnergyGuide label lists estimated yearly use in kWh. That one figure gives you the fridge’s average draw, which already includes compressor cycling (the duty cycle).
- Find the kWh per year on the label or in the manual.
- Average watts = kWh per year x 1,000 / 8,760 (the hours in a year).
- Daily watt hours = kWh per year x 1,000 / 365.
Example: a fridge labeled 600 kWh per year averages 600 x 1,000 / 8,760 = about 68.5W, or about 1,644Wh per day. If its compressor draws 300W while running (an assumed figure at the low end of Anker’s range), it is running roughly 23 percent of the time.
Label figures assume standard test conditions. A hot kitchen, frequent door openings or an older unit will use more, so leave margin.
How long will a power station run a fridge?
The formula:
Runtime hours = battery Wh x inverter efficiency / average watts
We assume 0.85 for inverter efficiency, meaning about 15 percent of stored energy is lost converting battery DC to household AC. That is an assumption, not a measured value for any model. Using our example fridge (600 kWh per year, about 68.5W average), a 2,042Wh station works out to 2,042 x 0.85 / 68.5 = about 25 hours.
Stations also draw some power just being on. Anker lists 9W idle consumption for the SOLIX C2000 Gen 2, for instance, and that overhead shortens runtime further when the fridge is the only load.
Power station for refrigerator: models we carry compared
Specs below come from our product listings. Prices are listed at the time of writing and change often. The runtime column is an estimate for the example fridge only (600 kWh per year label, about 68.5W average, 0.85 inverter efficiency assumed). It is not a test result.
| Station | Battery | Rated output | Surge / peak | Price | Est. example fridge runtime |
|---|---|---|---|---|---|
| Anker SOLIX C1000 Gen 2 | 1,024Wh | 2,000W | 3,000W peak | $549.99 | About 12.7 hours |
| Jackery HomePower 1000 v2 (White) | 1,070Wh | 1,500W | 3,000W surge | $549 | About 13.3 hours |
| Jackery Explorer 1500 v2 | 1,536Wh | 2,000W | 4,000W surge | $999 | About 19 hours |
| Jackery Explorer 2000 v2 | 2,042Wh | 2,200W | 4,000W surge | $899 | About 25 hours |
| Anker SOLIX C2000 Gen 2 | 2,048Wh | 2,400W | 4,000W peak | $999.99 | About 25 hours |
| Anker SOLIX F3000 | 3,072Wh | 3,600W | Not listed | $1,499.99 | About 38 hours |
| Jackery HomePower 3600 Plus | 3,584Wh | 3,600W | Not listed | $2,799 | About 44 hours |
| Anker SOLIX F3800 | 3,840Wh | 6,000W | Not listed | $2,199.99 | About 48 hours |
Anker says the C2000 Gen 2 can power a dual door fridge for up to 32 hours, and up to 64 hours with its BP2000 expansion battery. Anker’s F3000 listing claims up to 2 days of cooling an 8 cu. ft. fridge. Jackery says the HomePower 3600 Plus, expanded to 21kWh, can keep a fridge running for up to 14 days. Those depend on the fridge used, so trust your own label math.
Browse the full Jackery lineup for other sizes.
What about the Jackery FridgeGuard?
The Jackery FridgeGuard is built specifically for fridge backup. Its listing describes a 2.6 inch slim design that sits beside, behind or on top of the fridge, UPS style switchover of 10 ms or less when the power cuts out, Delay Start and Bypass Mode, surge protection, a LiFePO4 battery, and capacity that can be expanded up to 2,048Wh. The listing does not state the base battery capacity or output wattage, so confirm those with us before relying on it for a specific fridge.
Picking the right size
- Short outages (under half a day): a 1,000Wh class station with at least 1,500W rated output and 3,000W surge covers many full size fridges.
- Overnight to a full day: look at 1,500Wh to 2,000Wh. Anker’s guide also recommends a 20 to 30 percent safety margin on top of your estimate.
- Multi day or fridge plus other loads: 3,000Wh and up, or a station that accepts expansion batteries and solar. For whole home planning, transfer switches and outage priorities, see our home backup power guide.
For longer outages, Anker’s guide suggests about 400W to 600W of solar panels to keep up with a fridge using 1,000Wh to 2,000Wh per day.
Safety and setup
Plug the fridge directly into the station’s AC outlet with a properly rated cord. If you want the station to feed house circuits, that requires a transfer switch installed by a licensed electrician, and local code has the final word. Never backfeed a home through an outlet. Gas generators should never run indoors or in a garage; battery stations avoid that exhaust risk, which is one reason people choose them for kitchen backup.
Frequently asked questions
What size power station do I need for a refrigerator?
For many full size fridges, about 1,500W or more of continuous output as a rule of thumb, a surge rating above the compressor’s startup spike, and 1,000Wh to 2,000Wh of battery for roughly a day. Use your EnergyGuide label to refine it.
How long will a power station run a fridge?
Divide battery Wh x inverter efficiency (we assume 0.85) by your fridge’s average watts. A 600 kWh per year fridge averages about 68.5W, so a 1,024Wh station gives about 12.7 hours before idle losses.
How do I find my fridge wattage?
Check the EnergyGuide label for kWh per year and multiply by 1,000, then divide by 8,760 for average watts. The appliance tag’s amps x volts gives a rough running figure; startup surge is higher.
Still deciding? Our portable power station buying guide covers ports, battery chemistry and charging, and our electric bike range guide walks through the same watt hour math for e-bikes. We offer free freight shipping on orders of $999 or more, with a $200 flat rate below that. Call us at 866-777-2590, Monday to Friday, 9AM to 6PM PST, and see our return and refund policy before you buy.
