Battery Back-UPS or APC. You can usually find these all over for sale. FB Marketplace Thrift stores. Even look up some you tube for ways to greatly extend the power run time. I think if you run absolute bare mins on one or even two of them, you'll be gtg. I live here in Florida also and power outages in the short term do happen fairly regularly. For the long term... Get a little mini generator just big enough to run the fridge/freezer a fan, light and most importantly... Emergency power to the Reef!... If you know what I mean...lol