Since the UPS itself won't "wake" your PC over the network, the most reliable configuration involves the following steps:
To solve this, we need the for APC UPS configuration.
Your computer's motherboard must support states—specifically the S5 state (soft off). The power supply must also provide continuous standby voltage (+5VSB) to the motherboard while the system is off. This keeps the network port alive. 3. Network Interface Card (NIC)
When the UPS restores AC output after power returns, the computer detects the current and automatically boots without needing a WoL packet.
If you followed the "Best" settings and it still fails, run this checklist: apc ups wake on lan best
A dedicated master device on the network (such as a router, a Raspberry Pi, or a network management card) detects that power is restored and broadcasts a "Magic Packet" to the MAC addresses of the shut-down machines, automatically waking them up. 2. Setting Up Your Hardware for WoL Recovery
While simpler, the Wake-on-LAN method remains superior for environments where you want precise control over when a machine turns back on, or if you need to wake machines sequentially to prevent a massive power surge on your circuits. Summary Troubleshooting Checklist
Whether you are sending WoL packets from inside or
To maximize the reliability of your remote power-on infrastructure, adhere to these three industry best practices: Since the UPS itself won't "wake" your PC
Step 2: Configure the Network Interface Card (NIC) in Windows Open and expand Network adapters . Right-click your Ethernet controller and select Properties .
If you must use WOL (e.g., you want to keep the server off until you manually trigger it), you must ensure your network infrastructure remains powered. NMC 'Wake on LAN' support - Schneider Electric Community
Look for settings labeled , Power On By PCI-E , or Resume by PME . Change the setting to Enabled . Save changes and exit.
: Bring your infrastructure back online remotely without driving to a physical site. This keeps the network port alive
or the rack-mountable Smart-UPS 2200VA) with software like PowerChute Network Shutdown, your connected servers and PCs will gracefully power down before the battery completely depletes. This prevents data corruption.
Not all UPS units handle automated power restoration the same way. To get the best results for WoL environments, look for units with smart management capabilities. 1. APC Smart-UPS Series (Best for Enterprise & Homelabs)
Your router, firewall, and local switches must be plugged into the APC UPS. If any device in the network path loses power, you cannot send a WoL packet from the outside world.
When an APC UPS detects a power failure, its primary job is to keep your equipment running long enough to bridge short outages or trigger a controlled shutdown. Relying on standard BIOS power settings to handle the aftermath of a power outage can lead to boot loops, missed startup sequences, or hardware strain.
Note: You will need to add this to a systemd service to make it persistent after reboot.
To ensure your system recovers perfectly every single time, implement these industry best practices: