What Size Generator to Run a Refrigerator?
Last updated:
Fact-checked by Marcus Hayes, Master Electrician (License #CA-EL-89241), 15 years generator installation experience.
Key Takeaways
- A standard refrigerator needs 800 to 1,200 running watts and 2,200 starting watts (surge).
- A 2,200W generator is the minimum to run a refrigerator; a 3,000W generator gives comfortable headroom.
- Refrigerator compressors need 2 to 3 times their running wattage for 2 to 3 seconds at startup.
- A solar generator like the EcoFlow Delta Pro 3 can run a refrigerator for 3 to 5 hours on battery alone.
- To run two refrigerators, use a 3,000W+ generator and stagger the loads so both compressors do not start simultaneously.
How many watts does a refrigerator use?
A modern refrigerator uses 800 to 1,200 running watts and needs 2,200 starting watts (surge) for 2 to 3
seconds when the compressor cycles on. Older or larger refrigerators may use up to 1,500 running watts
with 3,000 starting watts. Check the nameplate on the back or inside the refrigerator for exact wattage.
Minimum generator size for a refrigerator
A 2,200W generator is the minimum to run a standard refrigerator, because the compressor needs 2,200
starting watts to cycle on. A 3,000W generator is a safer choice — it gives you headroom to also power
lights, a few outlets, or small appliances alongside the refrigerator without tripping the breaker.
Frequently Asked Questions
What size generator do I need to run a refrigerator?
A standard refrigerator needs 800 to 1,200 running watts and 2,200 starting watts. A 2,200W generator is the minimum to run a refrigerator alone. A 3,000W generator gives comfortable headroom to also power lights and small appliances alongside the refrigerator.
How many watts does a refrigerator use?
A modern refrigerator uses 800 to 1,200 running watts and needs 2,200 starting watts (surge) for 2 to 3 seconds when the compressor cycles on. Older or larger refrigerators may use up to 1,500 running watts with 3,000 starting watts. Check the nameplate on the back or inside the refrigerator for exact wattage.
Can a 2000 watt generator run a refrigerator?
A 2,000W generator can run a refrigerator if its starting watt rating is at least 2,200W. Most 2,000W generators have a starting watt rating of 2,200 to 2,500W, which is enough for a standard refrigerator. However, you will not have much headroom for additional loads. A 3,000W generator is a safer choice.
Can I run two refrigerators on one generator?
Two refrigerators need 1,600 to 2,400 running watts combined, but the starting watts of both compressors starting simultaneously could reach 4,400W. In practice, the compressors rarely start at the same time, so a 3,000W generator can usually handle two refrigerators. To be safe, stagger the loads — let one refrigerator start before plugging in the second.
Will a 1000 watt inverter generator run a refrigerator?
A 1,000W inverter generator with 1,200 to 1,500 starting watts may struggle to start a standard refrigerator that needs 2,200 starting watts. It may work with a smaller, energy-efficient refrigerator (600W running, 1,200W starting), but most full-size refrigerators require at least a 2,200W generator.
Can a solar generator run a refrigerator?
Yes, but you need a solar generator with at least 2,200W output and sufficient capacity. The EcoFlow Delta Pro 3 (4,096Wh, 4,000W output) can run a standard refrigerator for approximately 3 to 5 hours on battery alone. With solar panels recharging during the day, it can extend that runtime significantly. The Bluetti Elite 200 V2 (2,073Wh, 2,600W output) can run a refrigerator for about 1.5 to 2.5 hours.