Quick Answer
A 2000-watt inverter generator is ideal for most refrigerators. It handles the startup surge (1200W), runs quietly, and can power additional items like lights, phones, and a small freezer. Our top pick: Honda EU2200i.
Our Top Picks for Refrigerator Generators
Honda EU2200i
The quietest, most reliable generator for running a refrigerator.
WEN 56203i
Half the price of premium options with similar performance.
Westinghouse iGen4500DF
Run refrigerator, freezer, and more with dual fuel flexibility.
How Many Watts Does a Refrigerator Need?
Understanding refrigerator wattage is the key to choosing the right generator. Here's what you need to know:
- Running watts: 100-400W (what it uses while running)
- Starting watts: 1,000-1,500W (surge when compressor kicks in)
The starting surge is why a 1000W generator won't work even though your fridge only uses 150W while running. You need to account for that initial spike when the compressor starts.
| Refrigerator Type | Running Watts | Starting Watts | Recommended Generator |
|---|---|---|---|
| Mini Fridge (1.7-4.5 cu ft) | 50-100W | 300-500W | 1000W+ |
| Standard Fridge (18-22 cu ft) | 100-200W | 800-1,200W | 2000W+ |
| Large Fridge (22-28 cu ft) | 150-300W | 1,000-1,500W | 2000W+ |
| Side-by-Side (25+ cu ft) | 200-400W | 1,200-2,000W | 3000W+ |
| Fridge + Freezer Combo | 300-500W | 1,800-2,400W | 3000W+ |
Pro tip: Check your refrigerator's label (usually inside the door or on the back) for exact wattage. Multiply the amps by 120 to get watts.
Generator Tips for Refrigerator Use
1. You Don't Need to Run It Continuously
Refrigerators only run their compressors about 30% of the time. A well-insulated, full fridge can stay cold for 4-6 hours without power. Run your generator for 2-3 hours, then shut it off for 4-5 hours to save fuel.
2. Keep the Fridge Full
A full refrigerator stays cold longer than an empty one. Fill empty space with water bottles—they act as thermal mass and also give you emergency drinking water.
3. Use an Inverter Generator
Modern refrigerators have electronic control boards. Inverter generators produce clean, stable power that won't damage these sensitive components. Conventional generators can cause problems.
4. Never Run a Generator Indoors
Place your generator at least 20 feet from your house with the exhaust pointed away from windows and doors. Carbon monoxide is odorless and deadly.
Calculate Your Exact Needs
Not sure what size generator you need? Our Generator Size Calculator will help you add up all the appliances you want to power and recommend the right generator size.