How many watts does a mini fridge use? (2026 numbers by size and type)

A mini fridge typically runs on 50–150 watts continuously and pulls a surge of 150–400 watts for 1–3 seconds each time the compressor kicks on. Because it cycles on and off around the clock, even a small unit can quietly add $3–$13 per month to your bill at Southern California Edison rates — or $2–$8 at LADWP rates — without most homeowners noticing.

Last verified: August 2026 by Helios Energy Global.

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Running watts vs. starting watts: why both numbers matter

Every fridge with a compressor has two wattage figures:

• Running watts — the steady draw while the compressor is actively cooling. This is what shows up on your electricity bill.
• Starting (surge) watts — the brief spike when the compressor motor first turns on. Can be 2–3× the running wattage for 1–3 seconds.

For your electric bill, only running watts matter. For a battery backup or generator, the starting-watt spike determines whether the device can actually start the fridge — a common surprise during outages.

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Wattage and cost table by mini fridge type and size

Type / Size	Running Watts (est.)	Starting Watts (est.)	kWh/day (est.)	$/month SCE ~34¢	$/month LADWP ~22¢
Compact cube (1.7–2.5 cu ft), modern	50–70 W	150–200 W	0.3–0.5 kWh	~$3–$5	~$2–$3
Dorm-style (3.2–4.5 cu ft), modern	70–100 W	200–280 W	0.5–0.7 kWh	~$5–$7	~$3–$5
Mid-size (4.5–6.0 cu ft), modern	85–120 W	240–320 W	0.6–0.9 kWh	~$6–$9	~$4–$6
Full mini (6.0–7.5 cu ft), modern	100–150 W	280–400 W	0.7–1.2 kWh	~$7–$13	~$5–$8
Any size, 10+ years old	add ~30–50%	add ~30–50%	add ~30–50%	significantly higher	significantly higher
Thermoelectric / Peltier (no compressor)	40–60 W	same (no surge)	0.9–1.4 kWh	~$9–$14	~$6–$9

All figures are estimates based on EIA residential appliance data and ENERGY STAR certified product ranges. Your actual unit may vary. Thermoelectric coolers run continuously with no cycling, which is why their daily kWh is higher despite lower wattage.

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How to find your specific mini fridge's wattage

You don't have to guess. Three reliable methods:

1. Check the nameplate label. Look on the inside wall or the back of the unit for a sticker listing volts and amps. Multiply them: Watts = Volts × Amps. A label reading "115V / 1.0A" means ~115 running watts.

2. Use a plug-in watt meter. A $15–$25 energy monitor (Kill A Watt style) plugs between the fridge and the outlet and shows real-time and cumulative kWh. Run it for 24 hours for an accurate daily number.

3. Check ENERGY STAR's certified product list. If your model is listed, the annual kWh figure is right there — divide by 365 for daily use.

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The always-on problem: why mini fridges add up

Unlike a TV or microwave, a mini fridge never turns off. It cycles its compressor roughly 30–50% of the time (called the duty cycle), but it's drawing power every hour of every day. Over a year:

• A modern 4.5 cu ft dorm fridge uses roughly 200–250 kWh/year
• At SCE's 34–35¢/kWh blended rate, that's **$68–$88/year**
• At LADWP's 22¢/kWh rate, that's **$44–$55/year**

Add a second mini fridge in the garage — common in Southern California homes — and you've added another $70–$175/year to your bill before accounting for SCE's 4–9 PM TOU peak, when rates climb even higher. Running the compressor during that window costs meaningfully more.

LADWP customers have a notable advantage here: retail-rate net metering is still in place for LADWP (unlike SCE, which is on NEM 3.0 / Net Billing Tariff), so solar kilowatt-hours offset mini fridge load at close to full retail value around the clock. SCE customers on NEM 3.0 get much lower export credits and benefit more from pairing solar with a battery to self-consume during peak hours. See our NEM 3.0 explainer for the full picture.

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How a mini fridge factors into solar system sizing

When we design a solar system, every always-on load gets special attention because it runs 24/7 — including overnight when panels produce nothing.

Daily load contribution

A single mid-size mini fridge running at ~100 watts with a 40% duty cycle contributes roughly:

• 100 W × 0.40 duty cycle × 24 hrs = ~1.0 kWh/day

If you have two (one in the kitchen, one in the garage), that's ~2 kWh/day of baseline load just from mini fridges. Our whole-home load calculator factors this in automatically when you enter your appliances.

Battery sizing implications

A home battery needs to cover overnight loads — and a mini fridge is one of the biggest overnight draws because it never stops. Here's a rough calculation:

• Mini fridge: ~0.5–1.0 kWh overnight (8 PM to 6 AM = 10 hrs)
• At 100 W running / 40% duty cycle: ~0.4 kWh per 10-hour night
• Two mini fridges: ~0.8 kWh just to keep them cold overnight

On SCE's NEM 3.0, the financial case for battery storage is strong specifically because you want to avoid drawing from the grid during the 4–9 PM peak. A battery charged by solar during the day can power your fridge (and everything else) through that window. Learn more on our battery sizing guide.

For a typical Southern California home with one or two mini fridges plus standard appliances, a 10–13.5 kWh battery (one unit, installed cost roughly $10,000–$16,000) covers most overnight and peak-hour loads. Larger homes or those with garage fridges, EVs, or medical equipment often need two units.

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Old mini fridges: the hidden energy hogs

A mini fridge more than 10 years old can use 30–60% more electricity than a current ENERGY STAR model of the same size. The compressors are less efficient, the door seals degrade, and the insulation loses effectiveness — especially in a hot Southern California garage where ambient temps regularly hit 90–100°F in summer, forcing the compressor to work harder and run longer.

Real-world impact: An older 4.5 cu ft garage fridge that draws 130 watts with a 50% duty cycle uses about 570 kWh/year — versus ~220 kWh/year for a modern equivalent. At SCE rates, that's roughly $194/year vs. $75/year. Replacing it pays back in under two years on the electricity savings alone, before any solar offset.

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Mini fridges and solar: the localization angle

SCE customers (most of coastal and inland SoCal): Your ~34–35¢/kWh blended rate, combined with NEM 3.0's low export credits, means the best strategy is to maximize self-consumption. Size your solar to cover daytime loads and charge a battery; let the battery power the fridge overnight. See how solar + battery works under NEM 3.0.

LADWP customers (City of Los Angeles): At ~22¢/kWh with retail-rate net metering still intact, the math is simpler — solar offsets mini fridge load at close to full value. A battery is still useful for outage resilience, but the financial urgency is lower than for SCE customers.

Other Southern California munis (Pasadena PWP, Burbank, Glendale, Anaheim APU, Riverside RPU): Each runs its own net metering program, not NEM 3.0. Rates and export credits vary — check with your utility or ask us during a free consultation.

For a full picture of what your mini fridge contributes to your total home load — and how solar offsets it — see what uses the most electricity in a home and how many watts it takes to run a house.

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Frequently asked questions about mini fridge wattage

How many watts does a mini fridge use per hour?

A modern mini fridge draws 50–150 watts while the compressor is running, but the compressor only runs roughly 30–50% of the time. So the effective average draw is closer to 25–75 watts per hour — which is why daily kWh is a more useful number than instantaneous wattage.

How much does it cost to run a mini fridge all month?

At SCE's ~34–35¢/kWh rate, expect $3–$13/month depending on size and age. At LADWP's ~22¢/kWh, it's roughly $2–$8/month. An older or larger unit, or one sitting in a hot garage, will land at the high end of those ranges.

Does a mini fridge use a lot of electricity compared to a full-size fridge?

Not necessarily less. A modern full-size refrigerator (18–22 cu ft, ENERGY STAR) uses roughly 400–600 kWh/year. A modern mini fridge uses 150–350 kWh/year. But an old, inefficient mini fridge in a hot garage can approach or exceed what a modern full-size fridge uses — size alone doesn't determine efficiency.

Can a mini fridge run on a home battery during an outage?

Yes — a mini fridge is one of the easiest loads for a home battery to handle. At ~100 watts average draw, a 10 kWh battery can run a mini fridge for 40+ hours if that's the only load. In practice you're running lights, phone chargers, and other devices too, but a fridge is well within range for a single battery unit. See our battery page for details.

Will solar panels power my mini fridge?

Yes. A single 400-watt solar panel produces roughly 1.5–2.0 kWh on a typical Southern California day — enough to more than cover one mini fridge's daily use of 0.3–1.2 kWh. The challenge is overnight: panels don't produce power after dark, so a battery or grid connection is needed to keep the fridge running through the night.

What's the surge wattage of a mini fridge, and why does it matter?

The surge (starting) wattage — 150–400 watts for most mini fridges — is the brief spike when the compressor motor starts. It lasts only 1–3 seconds but matters for two situations: sizing a generator (it must handle the surge, not just the running load) and sizing a battery inverter (same reason). For normal grid-connected solar systems, surge wattage is not a concern.

Is a thermoelectric mini fridge more efficient than a compressor mini fridge?

No — despite lower running wattage (40–60 W), thermoelectric (Peltier) coolers run continuously with no cycling, so they often use more total kWh per day than a comparably sized compressor fridge. They're quieter and have no surge, which helps in some battery backup scenarios, but they're not the energy-efficient choice for always-on use.

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Next steps

• Book a free consultation and custom design — we'll factor in every always-on load including mini fridges when sizing your system.
• See your estimated savings with a custom design — enter your appliances and get a real number.
• Understand battery storage options for Southern California — including how a battery handles overnight fridge loads under NEM 3.0.
• What uses the most electricity in a home? — the full appliance-wattage breakdown.
• How many watts does it take to run a house? — whole-home load context.
• Solar panel cost in Southern California — current installed price ranges for 2026.