/etc/apcupsd/apcupsd.confを編集

...
UPSCABLE usb
...
UPSTYPE usb
# DEVICE /dev/ttyS0
DEVICE
...
# TIMEOUT 0
TcIMEOUT 60
...

/etc/default/apcupsdを編集

# Defaults for apcupsd initscript (unused with systemd as init).
# Set to "yes" to enable startup of apcupsd.
#ISCONFIGURED=no
ISCONFIGURED=yes

再起動

# systemctl restart apcupsd.service

状態を確認

# apcaccess status

APC      : 001,027,0654
DATE     : 2020-12-17 18:02:13 +0900
HOSTNAME : demo1
VERSION  : 3.14.14 (31 May 2016) debian
UPSNAME  : demo1
CABLE    : USB Cable
DRIVER   : USB UPS Driver
UPSMODE  : Stand Alone
STARTTIME: 2020-12-17 17:59:27 +0900
MODEL    : Smart-UPS 1500
STATUS   : ONLINE
BCHARGE  : 100.0 Percent
TIMELEFT : 45.0 Minutes
MBATTCHG : 5 Percent
MINTIMEL : 3 Minutes
MAXTIME  : 60 Seconds
ALARMDEL : 30 Seconds
BATTV    : 27.3 Volts
NUMXFERS : 0
TONBATT  : 0 Seconds
CUMONBATT: 0 Seconds
XOFFBATT : N/A
STATFLAG : 0x05000008
MANDATE  : 2020-08-20
SERIALNO : J12034211463
NOMBATTV : 24.0 Volts
FIRMWARE : UPS 09.5 / ID=18
END APC  : 2020-12-17 18:02:22 +0900