Backup power systems are devices that provide electricity when the main power source fails. They are essential for maintaining operations in homes, businesses, and critical facilities like hospitals. Common types include generators, uninterruptible power supplies (UPS), and solar battery systems. These systems ensure that essential equipment continues to function during outages. These systems can be powered by various sources, such as diesel, natural gas, or renewable energy. Backup power systems are designed to automatically activate during a power failure, minimizing disruption. Proper maintenance and regular testing are crucial to ensure reliability when needed most.