Frequently Asked Questions : What occurs if there is a power outage during a UPS firmware upgrade?
What occurs if there is a power outage during a UPS firmware upgrade?
During a power outage, when input power to the UPS is interrupted:
If the UPS is on battery, a UPS firmware upgrade cannot be initiated.
When a UPS firmware upgrade is already in progress when the input power is interrupted:
If the firmware upgrade was initiated with output power off, the firmware upgrade will complete.
If the firmware upgrade was initiated with output power on, power supply from the UPS to the connected devices will be interrupted, and connected devices will not be shut down gracefully. The firmware upgrade will complete successfully.
See also: UPS Firmware Upgrade Issues