🔧 Configuration:
• apcupsd is installed and running ✅
• UPS (Smart-UPS 1500) detected and reporting via USB ✅
• /etc/apcupsd/apcupsd.conf includes:
• ONBATTERYDELAY 6
• TIMEOUT 600 (shutdown after 10 min on battery)
• BATTERYLEVEL, MINUTES also correctly defined ✅⚡ Simulated Tests:
• Manual onbattery trigger tested ✅
• wall terminal alerts confirmed working ✅
• msmtp email integration now fixed (no -s error) ✅🧪 Shutdown flow:
• apccontrol runs doshutdown, which calls:/sbin/shutdown -h now “apcupsd UPS forced shutdown”
✅ The correct command for Proxmox to shut down cleanly.
✅ Final Summary: Yes, Proxmox Will Shut Down Automatically
If the UPS:
• loses mains power and
• stays on battery for >10 minutes (or any other threshold we set)→ Proxmox will shut itself down safely, thanks to apcupsd.