A: The main difference between an Online UPS and an Offline UPS is that an Online UPS continuously provides power to the connected load from its battery backup, while an Offline UPS only provides power to the load from its battery backup when there is a power outage or voltage fluctuation in the utility power supply.

While Online UPS systems are suitable for a wide range of applications, they may not be the most cost-effective option for powering home appliances due to their high cost and capacity. Instead, a line-interactive or offline UPS may be more suitable for home use, depending on the power requirements of the appliances.

Online UPS systems are suitable for a wide range of applications that require stable and reliable power supply, including data centers, server rooms, network operation centers, process industries, medical equipment, and communication systems.

Some of the advantages of an Online UPS include continuous power supply to the connected load, surge protection, noise protection, and live voltage regulation. Online UPS systems also offer a fast switchover time from utility power to battery power, which ensures uninterrupted power supply to the connected load in case of a power outage.