Backup power refers to an alternative energy source that provides electricity when the main power supply fails. This can be crucial during emergencies, such as storms or outages, ensuring that essential devices and systems remain operational. Common forms of backup power include generators, uninterruptible power supplies (UPS), and solar battery systems. These systems can automatically kick in when the primary power source is interrupted, allowing for a seamless transition. Backup power is especially important for businesses, hospitals, and homes that rely on electricity for safety, communication, and daily activities. Proper planning and maintenance of backup power systems can enhance reliability during unexpected events.