Precautions while using UPS
Normal power loss
The battery maintains the DC supply to the inverter upon normal power loss. The DC power supply to the inverter can be maintained by the battery until the power restoration of AC supply or end of the battery life cycle. Only under this condition, the inverter continues to supply the connected loads without any disruption. This sequence of operation will carry on until the system is shutdown only if the battery reaches the discharged state before the output of the charger is restored. A system shutdown may be initiated manually or without human intervention by a dc under voltage sensing device.