🔋 Modify Battery Charge Low for your UPS using NUT server
📆 2025-07-01 15:40
This is a follow up of the post
🔌 Installing and configuring NUT (Network UPS Tools) for your home lab
which is already too long so an edit there is useless.
This is why I chose to share the command used to set your UPS battery charge low parameter in a dedicated page.
Consider setting this value between 10 and 40 depending on your UPS load and battery health.
username and password values are the ones from /etc/nut/upsd.users
ups_name is the one set in /etc/nut/ups.conf
My UPS currently has this parameter at 10%. When the UPS battery is at 10% the last computer in my cluster shutdowns and only the modem and router are still powered on.
In case the battery gets depleted the modem and router turn off also. In case the power comes back in the 10% - 0% window I don't loose internet connectivity at all.