Just curious. I use an APC brand battery backup on my Brinsea. I also have a couple of generators if need be. I don't know exactly how long it will run the unit in the event of a power failure, but based on past experience running other small appliances, lights, etc. of similar power usage, I would estimate it should run my incubator at least 12 hours. I keep reading MANY posts about power failures and eggs getting chilled. Just curious how many of you are using some kind of emergency backup power?