A common failure point in remote power management occurs when an APC UPS shuts down a server(s) to preserve battery, but the subsequent return of utility power does not automatically restart the systems. Traditional BIOS "Restore on AC Power Loss" is insufficient for staggered or selective startups.
Not all APC UPS units support WoL passthrough. For best results, use a Smart-UPS or Back-UPS Pro with a USB or network management card (AP9630/AP9631). These can send a “power restored” signal that triggers WoL. apc ups wake on lan best