What are my options for a reliable backup power system for my home medical equip

Hey everyone, hoping to get some advice. I rely on a CPAP machine and a small oxygen concentrator at home, and the recent storm-related power outages in my area have me seriously worried. I can't afford to be without power for even a few hours.I'm starting to look into dedicated power solutions, like a home battery backup, specifically for my healthcare needs. I've been trying to do my own research and found a site like this one that has a lot of information on  home medical power supplies , but it's a bit overwhelming.Has anyone else here been through this process? What did you end up choosing? I'm trying to figure out what capacity I'd actually need to last through a night or potentially longer, and what the most reliable brands are. Any tips or things you wish you knew before buying would be a huge help. Thanks