shouldn't be 'nut.server.service' but should be 'nut-server.service'
I'll play again tomorrow. Thanks for the confirmation of a working system.
My error
[root@home ~]# systemctl status nut-server.service
● nut-server.service - Network UPS Tools - power devices information server
Loaded: loaded (/usr/lib/systemd/system/nut-server.service; enabled; vendor preset: enabled)
Drop-In: /usr/lib/systemd/system/nut-server.service.d
└─50koozali.conf
Active: active (running) since Sat 2021-04-24 13:42:25 AEST; 1 day 10h ago
Process: 1180 ExecStartPre=/sbin/e-smith/service-status nut (code=exited, status=0/SUCCESS)
Main PID: 1188 (upsd)
Memory: 604.0K
CGroup: /system.slice/nut-server.service
└─1188 /usr/sbin/upsd -F
Apr 24 13:42:25 mydomain.dyndns.org systemd[1]: Starting Network UPS Tools - power devices information server...
Apr 24 13:42:25 mydomain.dyndns.org systemd[1]: Started Network UPS Tools - power devices information server.
Apr 24 13:42:25 mydomain.dyndns.org upsd[1188]: fopen /var/run/nut/upsd.pid: No such file or directory
Apr 24 13:42:25 mydomain.dyndns.org upsd[1188]: listening on 127.0.0.1 port 3493
Apr 24 13:42:25 mydomain.dyndns.org upsd[1188]: listening on 127.0.0.1 port 3493
Apr 24 13:42:25 mydomain.dyndns.org upsd[1188]: Connected to UPS [UPS]: usbhid-ups-UPS
Apr 24 13:42:25 mydomain.dyndns.org upsd[1188]: Connected to UPS [UPS]: usbhid-ups-UPS