Does anyone have experience with Battery backups. I live in FL yay Hurricane. I want something that will power my retune pump for 8 hrs. if I an away when the power goes out. It normally comes back on in less than 8 hrs. The pump I want to power is about 100 Watts. Has anyone had experience with a reliable options that works and can last that long. I have a small battery backup that lasts 20 min currently but that's a long way from 8 hours. I have a generator so if I am home I can hook that up I am more concerned about power outages when i'm gone.