Redundant power supplies are backup systems designed to ensure continuous power to critical equipment. They work by having multiple power supply units that can take over if one fails, minimizing the risk of downtime. This is especially important in environments like data centers or hospitals, where uninterrupted power is essential. These systems are often configured in a N+1 setup, meaning there is one extra power supply beyond what is needed. If one unit fails, the others can handle the load without interruption. This redundancy enhances reliability and protects sensitive equipment from power outages.