Quick answer
Yes, a power station runs a fridge, and how long it lasts comes down to one number: a typical UK fridge-freezer uses roughly 1 to 2kWh a day, because the compressor cycles on and off rather than running flat out. Divide a unit's usable capacity by that daily figure and you get the runtime. A 1,000Wh station keeps a fridge going for roughly half a day to a full day, a 2,000Wh unit covers about a day, and a 3,000Wh unit carries one through a long outage with lights and phone charging on top. Two things matter as much as capacity: the inverter's surge rating has to sit comfortably above the fridge's running watts to absorb the compressor's brief start-up spike, and the output must be a pure sine wave so the motor runs cool.
Can a power station run a fridge?
Yes, a power station runs a fridge, and for most UK fridge-freezers a mid-size unit does it for the best part of a day. The number that decides everything is daily energy use: a typical fridge-freezer draws roughly 1 to 2kWh a day, because its compressor cycles on and off to hold temperature rather than running continuously. Take a unit's usable capacity, divide by that daily figure, and you have your runtime.
That cycling is why a fridge is far more manageable than its label suggests. A fridge might be rated at 100 to 150W while the compressor runs, but across a full day the motor is off more than it is on, so the real draw averages out to something a portable battery can carry. A 1,000Wh unit like the Anker SOLIX C1000 Gen 2 holds around 870Wh of usable energy, which is roughly half a day to a full day of fridge time depending on how thirsty yours is.
Buy the Anker SOLIX C2000 Gen 2 on AmazonHow long will a power station run a fridge?
The table below maps rough capacity tiers to approximate fridge runtime. These are calculated estimates, not lab tests. Each uses the site's usable-efficiency assumption: a power station delivers around 85% of its rated capacity to your devices, because the inverter and battery lose the rest as heat. The runtime range spans an efficient fridge-freezer at about 1kWh a day and a thirstier or older one at about 2kWh a day.
| Capacity tier | Usable (~85%) | Approx fridge runtime | Example model |
|---|---|---|---|
| ~1,000Wh | ~870Wh | ~10 to 21 hours (half a day to a day) | Anker SOLIX C1000 Gen 2 (1,024Wh) |
| ~2,000Wh | ~1,740Wh | ~21 to 42 hours (about a day, up to two) | Anker SOLIX C2000 Gen 2 (2,048Wh) |
| ~3,000Wh+ | ~2,610Wh | ~31 to 63 hours (a long outage, with headroom for lights and phones) | Anker SOLIX F3000 (3,072Wh) |
Read these as estimates, not promises. A modern A-rated fridge-freezer in a cool room sits near the top of each range; an older unit, a warm kitchen, or a door opened often pulls it toward the bottom. Weigh your own fridge's daily figure against the tier, and remember that in a real power cut you will want some of that capacity left for lights, the router and phone charging rather than spending all of it on the fridge.
Watch the surge, not just the running watts
The one thing that catches people out is the start-up surge. When a fridge compressor kicks in, it pulls a brief spike of power several times its running figure, over in a fraction of a second but real. A fridge that runs at 120W might momentarily demand 600W or more at the instant the motor starts.
That is why you check two output numbers, not one. The rated output has to cover the running watts easily, and the surge (or "peak") rating has to sit comfortably above that start-up spike. All three example units have generous headroom here: the C1000 Gen 2 rates 2,000W with a 3,000W surge, the C2000 Gen 2 2,400W with a 4,000W surge, and the F3000 3,600W with a 7,200W surge. Any of them absorbs a domestic fridge's start-up spike without flinching.
The other requirement is a pure sine wave output. A compressor motor needs the clean, smooth AC waveform that mains supplies. A cheap modified-sine inverter can make a fridge motor run hot, buzz, or refuse to start, so a pure sine wave unit is not optional for a fridge. Reputable power stations in this class supply pure sine wave AC as standard; confirm it on the spec sheet before you buy anything unbranded.
Campervan fridges: use the DC output
If your fridge is a 12V compressor model in a campervan or car, run it from the power station's 12V DC output rather than through the AC socket. Feeding a 12V fridge through the inverter means converting the battery's DC up to 230V AC and then straight back down to 12V inside the fridge, and every conversion wastes a little energy as heat.
Going DC to DC skips that round trip, so the same battery runs the fridge noticeably longer. Not every unit carries a high-current 12V socket, though, and it cannot be added later, so check the DC outputs for your specific fridge before you choose a model. A domestic 230V fridge-freezer has no such option: it plugs into the AC socket, which is where the surge and pure sine wave points above apply.
What size power station do I need for a fridge?
For a fridge alone through a short cut, a 1,000Wh unit covers half a day to a day and is the sensible entry point. For a fridge through a longer outage, or a fridge plus lights, router and phone charging, step up to 2,000Wh, which carries most fridge-freezers about a day with capacity to spare. For a genuinely long outage, or a fridge running alongside other essentials for a day or more, a 3,000Wh or expandable unit gives you the headroom, and the F3000 expands well beyond that if outages in your area run long.
Whichever tier you land on, the surge rating and pure sine wave output matter as much as the capacity. Size the battery for the hours you need, then confirm the output comfortably clears your fridge's start-up spike.
FAQ
Can a power station run a fridge?
How long will a 1000W power station run a fridge?
Why does the surge rating matter for a fridge?
Do I need a pure sine wave power station for a fridge?
Is it more efficient to run a campervan fridge on DC?
Where to next
Worked out your fridge runtime? The complete portable power station buying guide ranks every current UK model against the same fact base, and the what size power station do I need guide walks you through sizing a unit for everything else you want to run alongside the fridge.