You have actually 2 options.... Differently priced also.
First option, would be to get a generator, and this way, during a power outage, you still also have electricity for the rest of your home. Limited to of course the power output of unit. I have a generator, and have used it on occasion. At that time, I only use minimal electricity. Refrigerator, and minimal lights to get by. I don't use microwave, washing machine, toaster, or other high drain appliances.
Second option, is an Automotive 12 volt battery, and a power inverter.
Have that also. I have a small capacity inverter like this one rated for 400 watts. That would be plenty enough to power your incubator.
WISHING YOU BEST,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
