How many watts does a refrigerator use?
A typical full-size refrigerator uses 100 to 250 watts while running, with most modern units settling around 150 watts when the compressor is on. That figure is far lower than the number stamped on the nameplate, which often reads 6 to 7 amps (around 750 to 840 watts at 120 volts). The nameplate is a rated maximum, not what the fridge actually draws minute to minute, so do not size your power off it.
Size and style matter. A compact or mini-fridge uses about 50 to 100 watts running, a standard top-freezer or French-door model lands in the 100 to 250 watt range, and a large side-by-side with an ice maker sits at the high end. A standalone chest freezer behaves much like a fridge, drawing roughly 100 to 400 watts depending on size. For the exact figure for your unit, check the yellow EnergyGuide label or the model's spec sheet for its annual kWh, which is the most honest number to plan around.
Why does a refrigerator need so many startup watts?
A refrigerator needs a startup surge because its compressor is a motor, and motors pull two to six times their running wattage for a fraction of a second when they start. A fridge that runs at 150 watts can spike to 600 to 1,200 watts (sometimes higher on older or larger units) every time the compressor cycles on. The spike is brief, but any inverter or generator powering the fridge has to supply it or the unit will not start.
This surge is the single most common reason an undersized power station or inverter fails to run a fridge that, on paper, only needs 150 watts. The device handles the steady load fine, then trips the moment the compressor kicks in. It is why the right question is never just how many running watts, but whether the source can deliver the surge. Newer fridges with an inverter-driven compressor or a soft start ramp up gently and spike far less, which is why some efficient models start on surprisingly small batteries.
How much electricity does a refrigerator use per day?
A modern refrigerator uses about 1 to 2 kWh of electricity per day, or roughly 350 to 800 kWh per year, with Energy Star models often near the bottom of that range. Older fridges (pre-2010) can use two to four times as much. Daily use is so much lower than the running watts suggest because the compressor only runs about a third of the time; it cycles on and off to hold temperature rather than running flat out.
That cycling means the fridge's average draw over 24 hours is only about 50 to 80 watts, even though it pulls 150 watts when actually running. A unit using 1.5 kWh a day averages roughly 62 watts around the clock. This daily kWh figure, not the running wattage, is what your solar panels or battery bank have to replace, so it is the number to size everything around. For the difference between power and energy, see kW vs kWh.
What size inverter do you need to run a refrigerator?
To run a refrigerator off a battery you need a pure sine wave inverter rated for the fridge's running watts with enough surge headroom to cover the startup spike, which in practice means a 1,000 to 2,000 watt inverter for a typical full-size unit. A 1,000-watt pure sine inverter with a 2,000-watt surge rating runs most household fridges; step up to 1,500 watts continuous for a large side-by-side or for margin.
Two details matter. Use a pure sine wave inverter, not modified sine; fridge compressors and control boards run hotter, buzz, or fail early on modified-sine power. And check the inverter's surge (peak) rating, not just its continuous rating, because that is what answers the compressor's inrush current. A 600-watt inverter might match the running load yet trip every cycle. Then match the battery to the runtime you need; our breakdown of what a 100Ah battery can run shows how long stored power actually lasts a fridge.
How many solar panels does it take to run a refrigerator?
It takes only a modest amount of solar to offset a refrigerator, but the exact panel count depends on your sun hours and whether you need to run it overnight. Because a fridge uses just 1 to 2 kWh a day, the array to cover it is small next to high-draw loads like air conditioning. The catch, as always with solar, is storage: panels make power during the day, and a fridge runs 24 hours, so off-grid use means a battery to carry it through the night.
Rather than guess a flat number, size it to your real conditions. Add the fridge's daily kWh to the rest of your loads and run it through the solar panel calculator to get a panel count for your climate. If the fridge is the only thing you are powering (an off-grid cabin, an RV, or outage backup), a few hundred watts of panel paired with a battery usually covers it, but cloudy days cut output, so size for the worst week, not the best. For contrast, see why air conditioning needs a far bigger system than a fridge.
Can you run a refrigerator on a battery during a power outage?
Yes, a refrigerator is one of the best appliances to back up with a battery or solar generator, because its average draw is low and it only needs to cycle on occasionally to stay cold. A portable power station with around 1 kWh of capacity (such as a Jackery Explorer 1000) can keep a fridge running for roughly 10 to 16 hours on its own, and pairing it with a solar panel to recharge during daylight can stretch that across a multi-day outage.
You can also reduce how hard the fridge works. Keep the door closed (a full fridge holds cold for about 4 hours unpowered, a freezer about 48 hours), and the compressor cycles less, sipping from your battery. For whole-house backup that picks up the fridge automatically, you need a home battery and a backup-capable inverter, which is wiring that belongs to a licensed electrician. For a plug-in solution you can set up yourself, a solar generator is the simpler path, and our solar generator vs gas generator comparison weighs it against fuel.
Frequently asked questions
Will a 1500 watt generator run a refrigerator?
Yes. A 1,500-watt running generator easily powers a refrigerator, which draws around 150 watts while running and surges to roughly 600 to 1,200 watts on startup. A 1,500-watt unit covers both with room to spare, and usually has enough left for a few lights or a phone charger. Just confirm the rating is 1,500 watts continuous, not a 1,500-watt peak with a lower running figure.
Will a 2000 watt generator run my fridge?
Yes, comfortably. A 2,000-watt generator runs a refrigerator and still has capacity for other small loads at the same time, since the fridge needs only about 150 running watts and a brief surge near 1,200 watts. A 2,000-watt inverter generator is a common, quiet choice for keeping a fridge and a few essentials going during an outage.
How many watts does a fridge use in 24 hours?
A modern refrigerator uses about 1 to 2 kWh of electricity over 24 hours, which averages out to roughly 50 to 80 watts of continuous draw. It pulls about 150 watts when the compressor is actually running, but it cycles on and off and runs only about a third of the time, so the daily total is much lower than the running wattage suggests. Older fridges can use two to four times as much.
Can a Jackery 1000 power a refrigerator?
Yes. The Jackery Explorer 1000 has a 1,002 Wh battery, a 1,000-watt output, and a 2,000-watt surge rating, which is enough to start and run a typical household refrigerator. On its own it keeps a fridge cold for roughly 10 to 16 hours depending on the model; add a solar panel to recharge it during the day and you can run the fridge through a multi-day outage.
Will a 1000 watt inverter run a refrigerator?
Usually yes, as long as it is a pure sine wave inverter with a surge rating around 2,000 watts. A 1,000-watt pure sine inverter handles a typical fridge's 150-watt running load and its startup surge. A 1,000-watt modified sine inverter is riskier; the compressor can run hot or refuse to start, so pure sine is worth it for a refrigerator.