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What size power station runs a refrigerator?
A kitchen fridge is usually the first thing people want to keep alive in an outage, and it is also the load that most often gets sized wrong. The fix is to size from energy per day, not the wattage on a sticker, and then check that the station can handle the compressor kicking on.
Step 1: Find how much energy your fridge uses per day
The yellow EnergyGuide label lists estimated yearly use in kWh. Divide by 365 to get kWh per day, then multiply by 1,000 for watt-hours (Wh).
If you do not have the label, these published averages are a reasonable starting point:
- The U.S. Department of Energy puts average yearly use at about 384 kWh for refrigerators and 588 kWh for refrigerator-freezers (DOE). That works out to roughly 1,050 Wh per day and 1,610 Wh per day.
- Among ENERGY STAR certified full-size models, one analysis of the certification data found a median of about 457 kWh per year, or roughly 1,250 Wh per day (Electric Consumer, using ENERGY STAR data).
- By style, certified top-freezer models had a median near 362 kWh per year, bottom-freezer near 556, and side-by-side near 640 (Fridge.com energy index).
Those are lab test figures. A fridge in a hot garage, one that gets opened often, or an older unit can use noticeably more. ENERGY STAR notes that an old refrigerator uses about 20% more energy than a new certified one (ENERGY STAR fact sheet). If you can, plug the fridge into a plug-in energy meter for 24 hours and use the real number.
Step 2: Account for inverter losses
A power station's AC outlet runs through an inverter, and some stored energy is lost along the way. For planning, this page assumes about 85% of rated capacity reaches the fridge. That is a conservative rule of thumb, not a measured figure for any specific model, so check the manual for your station.
Hours of runtime ≈ (capacity in Wh × 0.85) ÷ (fridge Wh per day ÷ 24)
You can plug your own numbers into the runtime calculator.
Step 3: Check the startup surge
A compressor draws a short burst of power when it starts, well above its running average. If the station's inverter cannot cover that burst, it may shut off or refuse to start the fridge. Practical checks:
- Look at the fridge's nameplate amps or the manual for running and startup figures.
- Pick a station with continuous AC output comfortably above the fridge's running watts. Many 1 kWh-class stations in our table list 1,500 W or more of continuous output, which leaves room for a typical kitchen fridge, but confirm against your own unit's figures.
- Do not count on "boost" or surge-lifting modes as continuous output.
What that means in practice
Using the DOE refrigerator-freezer average (about 1,610 Wh per day, or roughly 67 W on average) and the 85% assumption, estimated runtimes by capacity from the stations in our comparison table:
- About 288 Wh (Jackery Explorer 300 v2, BLUETTI Elite 30 V2, Anker SOLIX C300): roughly 3 to 4 hours. Fine for a short outage or keeping a mini-fridge cold, not for an overnight full-size fridge. The 300 W outputs on some of these are also tight for compressor startup.
- About 768 Wh (EcoFlow RIVER 2 Pro, 800 W output): roughly 9 to 10 hours.
- About 1,000 to 1,150 Wh (EcoFlow DELTA 3, BLUETTI Elite 100 V2, BLUETTI AC180, Jackery Explorer 1000 v2, Anker SOLIX C1000 Gen 2): roughly 13 to 15 hours. This is the smallest class most people should consider for a full-size fridge through one night.
- About 2,000 to 2,300 Wh (Jackery Explorer 2000 v2, BLUETTI Elite 200 V2, BLUETTI AC200L, BLUETTI AC200P L, Anker SOLIX C2000 Gen 2): roughly 26 to 29 hours, enough for about a full day on one charge.
A refrigerator without a freezer at the DOE average (about 1,050 Wh per day) runs roughly 50% longer than those estimates. A side-by-side model will run shorter.
Stretch the runtime
- Keep doors closed. FoodSafety.gov, citing USDA guidance, says a closed refrigerator keeps food safe for up to 4 hours without power, and a full freezer holds a safe temperature for about 48 hours (about 24 hours if half full) with the door shut (FoodSafety.gov). That means you can run the fridge in blocks instead of continuously.
- Run the fridge on the station for a few hours, then unplug it while you recharge from solar or a car, then repeat.
- Plan a recharge path for outages longer than a day. Check a station's maximum solar input before buying panels.
Picking from the table
Sort the comparison table by $/Wh, then filter to at least 1,000 Wh and at least 1,500 W of continuous output for a full-size fridge. Prices on the table come from official brand pages and were last checked on the date shown in each row; they change often, so confirm on the brand page before you buy.
For broader outage planning, including routers and CPAP machines, see home backup essentials.