Depends if I am at work or not. I am currently contemplating a large ups that should be able to run for a few hours. I am not too worried about the heat. The temp in my home is pretty consistant and in winter I make use of a fireplace which just so happens to be in the same area as my tanks. My biggest concern without power is my tanks and the fridge. So working on something that will be able to run these for around 8 hours would be awesome. I have solar lights and hot water.