| Quick answerA modern full-size refrigerator draws about 100 to 250 watts while its compressor runs and uses roughly 300 to 600 kWh a year. The 300 to 800 watt figure on many labels is a maximum, not an average. In California, that yearly use costs about $100 to $275 at June 2026 average residential rates of 33.7 cents per kWh (PG&E), 34.4 cents (SCE) and 45.5 cents (SDG&E), according to the CPUC Public Advocates Office. |
Key takeaways
- Running watts, not nameplate watts, drive your bill. Most fridges cycle on only part of each hour.
- A typical new fridge uses 0.8 to 1.6 kWh a day. Your EnergyGuide label gives the exact yearly number.
- In SDG&E territory the same fridge costs about a third more to run than in PG&E or SCE territory.
- A 15+ year old garage fridge can cost $185 to $250 a year more than a new one in California.
- One 430 watt solar panel produces about what a modern fridge uses in a year. Running it at night is a battery question.
Most refrigerator wattage guides are written for a country that pays 17 cents per kWh. California is not that country. When we size a backup battery for a homeowner in Riverside or San Jose, the refrigerator is the first load we ask about, and the answer is almost never the number printed on the sticker. Here is how to get the real number, and what it costs on the rate plan you are actually on in 2026.
How many watts does a refrigerator use?
A modern full-size refrigerator uses 100 to 250 watts while the compressor is running, and close to nothing between cycles. There are three different wattage numbers, and mixing them up is why so many estimates are wrong:
- Nameplate (rated) watts: volts times amps from the sticker inside the door. Often 300 to 800 watts. This is a ceiling for sizing a circuit, not what the fridge averages.
- Running watts: what the compressor actually draws once it is going. Usually 100 to 250 watts on a newer fridge.
- Startup watts: a brief spike when an older, fixed-speed compressor kicks on, several times the running watts for under a second. Newer inverter compressors ramp up gently and barely spike.
Table 1. Typical refrigerator wattage and yearly energy use by type (2026)
| Refrigerator type | Running watts | Typical kWh per year | kWh per day |
|---|---|---|---|
| Mini fridge (1.7 to 4.5 cu ft) | 50 to 100 W | 200 to 350 | 0.5 to 1.0 |
| Top-freezer (14 to 21 cu ft) | 100 to 200 W | 300 to 450 | 0.8 to 1.2 |
| Bottom-freezer (18 to 25 cu ft) | 120 to 250 W | 400 to 600 | 1.1 to 1.6 |
| French door (25 to 30+ cu ft) | 150 to 300 W | 500 to 750 | 1.4 to 2.1 |
| Side-by-side (22 to 28 cu ft) | 150 to 300 W | 550 to 750 | 1.5 to 2.1 |
| Fridge 15+ years old (often the garage one) | 200 to 400 W | 800 to 1,400 | 2.2 to 3.8 |
Ranges reflect typical EnergyGuide label values for current models; the kWh-per-year figure on your own label is the number to trust. See ENERGY STAR refrigerator guidance for certified model data.
How many kWh does a refrigerator use per day?
A typical new full-size refrigerator uses about 0.8 to 1.6 kWh per day. Take the yearly kWh from the yellow EnergyGuide label and divide by 365: a 450 kWh fridge averages 1.23 kWh a day.
A correction worth making out loud, because the earlier version of this page made the same mistake most sites make. Multiplying a 400 watt nameplate by 8 hours of runtime gives 3.2 kWh a day, or 1,168 kWh a year. That is roughly double what most new fridges are certified to use. The nameplate is a peak, and the compressor rarely runs at that peak. Start from the label, not the sticker.
Real-world use does run above the label in two situations common in California: a hot kitchen or garage in an inland summer, and a fridge with dusty coils or a tired door gasket.
How much does it cost to run a refrigerator in California?
A 450 kWh refrigerator costs about $152 a year on PG&E, $155 on SCE and $205 on SDG&E at June 2026 average residential rates. That is $12.60 to $17.10 a month for one appliance.
Table 2. Yearly cost to run a refrigerator in California, June 2026 average rates
| Yearly use | PG&E (33.7¢/kWh) | SCE (34.4¢/kWh) | SDG&E (45.5¢/kWh) |
|---|---|---|---|
| 300 kWh (efficient top-freezer) | $101 | $103 | $136 |
| 450 kWh (typical new fridge) | $152 | $155 | $205 |
| 600 kWh (large French door) | $202 | $206 | $273 |
| 1,000 kWh (15+ year old fridge) | $337 | $344 | $455 |
Source: residential average rates excluding the California Climate Credit, CPUC Public Advocates Office Q2 2026 Electric Rates Report. Fixed Base Services Charges not included. Your plan’s per-kWh price may differ.
[CHART: horizontal bar chart. Title: “Yearly cost to run a 450 kWh refrigerator, by California utility (2026)”. X-axis: dollars per year. Bars: PG&E $152, SCE $155, SDG&E $205, U.S. average at 17.9¢ $81. Source: CPUC Public Advocates Office Q2 2026; EIA March 2026 national average. Alt text: “Refrigerator running cost in California by utility, 2026”.]
Takeaway: the same refrigerator costs roughly 2.5 times more to run in San Diego than at the national average rate.
For context on where the fridge sits in your total bill, see our breakdown of the average electric bill in California and what appliances use the most electricity.
Does a time-of-use plan make a refrigerator more expensive?
Slightly, yes. A fridge is the one load you cannot shift out of the 4 to 9 p.m. peak. On SCE’s TOU-D-4-9PM plan, summer weekday electricity is 34 cents off-peak and 58 cents from 4 to 9 p.m. A fridge drawing the same power around the clock works out to about 38 cents per kWh averaged across a summer week, before SCE’s 10 cent baseline credit. In practice it is a little worse, because the compressor works hardest on hot evenings, exactly when the price is highest.
That is the everyday version of the argument for a home battery under California’s current rules: the battery covers the loads you cannot move, like the fridge, during the expensive hours.
Is it worth replacing an old refrigerator in California?
Often, yes, if the old one is 15+ years old and runs year-round. Replacing a 1,000 kWh fridge with a 450 kWh model saves about $185 a year on PG&E, $189 on SCE and $250 on SDG&E. A $1,200 replacement pays for itself in roughly 5 to 6.5 years on electricity alone.
ENERGY STAR notes that certified refrigerators are about 9% more efficient than the federal minimum, and that fridges over 15 years old cost noticeably more to run. Federal standards are also scheduled to tighten again: the U.S. Department of Energy’s refrigerator rule sets compliance dates of January 31, 2029 or 2030 depending on configuration, with an estimated 11% savings versus models on the market when the rule was written. DOE is currently revisiting how it sets appliance standards, so treat those dates as scheduled rather than certain.
The garage fridge problem
The most expensive refrigerator in many California homes is the old one in the garage. Garages in Fresno, Riverside and the Inland Empire routinely sit above 100°F in summer. A fridge sitting in that heat runs its compressor far longer than it did in a lab, and an older unit with worn seals can easily land in the 1,000+ kWh range. If you only need it for parties, unplug it the rest of the year. If you need it daily, move it indoors or replace it with a garage-ready model.
How many solar panels does it take to run a refrigerator?
About one panel. A 450 kWh fridge needs roughly 0.3 kW of solar, and a single 430 watt panel produces about 600 to 775 kWh a year on a good California roof, based on the production figures in our 5kW system output guide.
The catch is timing. That panel makes its power at midday, and your fridge runs all night too. Under California’s Net Billing Tariff (NEM 3.0), solar you export at noon earns a small credit, roughly 5 to 8 cents per kWh on average, while the power you buy back at 7 p.m. can cost 45 cents or more. So “one panel covers the fridge” is true on paper, and only partly true on your bill unless a battery carries the evening hours. Our guide to current solar panel costs in California covers full-system pricing.
How long can a home battery run a refrigerator during a power outage?
A single 13.5 kWh battery such as the Tesla Powerwall 3 could run a modern fridge for about a week on its own, since the fridge uses around 1.2 to 2 kWh a day. Real outages are different, because you also want lights, internet and phone charging. With solar recharging the battery each day, the fridge can run through a multi-day Public Safety Power Shutoff indefinitely.
Table 3. How long 13.5 kWh of battery storage lasts, with no solar recharge
| What you run | Approx. daily use | Runtime on 13.5 kWh |
|---|---|---|
| Refrigerator only (new, summer) | 1.5 to 2 kWh | 6 to 9 days |
| Fridge + lights, Wi-Fi, phones, TV | 4 to 6 kWh | 2 to 3 days |
| Fridge + essentials + a few hours of AC | 12 to 20 kWh | Under 1 day |
NRG planning estimates. Battery usable capacity per manufacturer specification; runtime varies with temperature and inverter losses.
Startup spikes are not a concern for a whole-home battery. The Powerwall 3 is rated for 11.5 kW of continuous output. Small portable power stations under about 1,000 watts are a different story and can trip when an older compressor starts. For sizing and pricing, see how much a solar battery costs and our home battery storage options.
How do I find out exactly how many watts my refrigerator uses?
Read the yearly kWh on the EnergyGuide label, then confirm it with a plug-in meter over a full week. Four ways, from easiest to most accurate:
- EnergyGuide label or spec sheet: search your model number for the yearly kWh figure.
- Nameplate: volts x amps inside the door gives the maximum, useful for circuits, not for bills.
- Plug-in watt meter: leave it on for 7 days and divide the kWh by 7. One day is not enough, because defrost cycles skew short readings.
- Your utility’s hourly data: PG&E, SCE and SDG&E smart meters show hourly usage in your online account. Your overnight baseline, when little else is running, is mostly your fridge, freezer and always-on devices.
How can I lower my refrigerator’s energy use?
Set the right temperatures, keep the coils clean and keep the door seal tight. Most households can trim 10% or more without buying anything.
- Keep the fridge at 37 to 40°F and the freezer at 0°F. Colder than that wastes energy without keeping food safer.
- Vacuum the condenser coils once or twice a year, more often with pets.
- Test the door gasket by closing it on a dollar bill. If the bill slides out easily, replace the gasket.
- Leave a few inches of airflow behind and above the fridge, and keep it away from the oven and direct sun.
- Retire or unplug a second fridge you do not truly need.
Frequently asked questions
How many watts does a refrigerator use per hour?
On average, a modern full-size fridge uses about 35 to 70 watt-hours per hour across a full day, because the compressor cycles on and off. While the compressor is running it draws about 100 to 250 watts.
How many amps does a refrigerator use?
Most full-size fridges draw 3 to 6 amps at 120 volts while running, with a brief higher spike at startup on older models. A dedicated 15 or 20 amp kitchen circuit is standard.
What size generator or battery do I need for a refrigerator?
A fridge alone needs very little energy, about 1.2 to 2 kWh a day. The limit is startup power on older compressors. Any whole-home battery handles it easily; portable units should be rated well above 1,000 watts of output.
How much does it cost to run a mini fridge in California?
A 250 kWh mini fridge costs about $84 to $86 a year on PG&E or SCE and about $114 on SDG&E at June 2026 average rates.
Does an empty refrigerator use more electricity?
Slightly. A reasonably full fridge holds its temperature better when the door opens, so the compressor recovers faster. Do not overpack it, though, since blocked vents make it work harder.
Why is my electric bill high if my fridge is efficient?
In California the rate usually matters more than any single appliance. Our guide to why your electric bill is so high walks through the usual causes by utility.
Want the fridge covered when the power goes out?
NRG Clean Power has installed solar and battery systems across California for more than 30 years (CSLB license #1026168). If outages or evening rates are what bother you, a right-sized battery keeps the fridge, lights and Wi-Fi running without paying peak prices. Get a quote in 2 minutes, or read how many kWh per day is normal for a California home first.