Wake On Lan Best [patched]: Apc Ups
Go to Control Panel > Power Options > Choose what the power button does. Disable "Turn on fast startup (recommended)." Why? Fast Startup is a deep hibernation. After a UPS-forced shutdown, Fast Startup corrupts the kernel state, and the NIC drivers fail to reinitialize. Disabling it ensures a fresh boot via WoL.
Are you running a home lab or a data center? Share your apcupsd configuration in the comments below. apc ups wake on lan best