DHCPDISCOVER & DHCPOFFER : every 5 min for a device thats offline?

[Pergola Fabio]

Hi, i have a marstek battery, its now turned off, but i still see every 5 mins constantly dhcpoffer/dhcp discover for this device in my ax-88u, eventually, the log is spammed with these...

how is that even possible for a device thats turned off completely?

Nov 29 10:02:48 dnsmasq-dhcp[1945]: DHCPDISCOVER(br0) xx:xx:xx:xx
Nov 29 10:02:48 dnsmasq-dhcp[1945]: DHCPOFFER(br0) 192.168.0.47 xx:xx:xx:xx
Nov 29 10:02:48 dnsmasq-dhcp[1945]: DHCPDISCOVER(br0) xx:xx:xx:xx
Nov 29 10:02:48 dnsmasq-dhcp[1945]: DHCPOFFER(br0) 192.168.0.47 xx:xx:xx:xx
Nov 29 10:02:48 dnsmasq-dhcp[1945]: DHCPREQUEST(br0) 192.168.0.47 xx:xx:xx:xx
Nov 29 10:02:48 dnsmasq-dhcp[1945]: DHCPACK(br0) 192.168.0.47 xx:xx:xx:xx wlan0
Nov 29 10:02:48 dnsmasq-dhcp[1945]: DHCPREQUEST(br0) 192.168.0.47 xx:xx:xx:xx
Nov 29 10:02:48 dnsmasq-dhcp[1945]: DHCPACK(br0) 192.168.0.47 xx:xx:xx:xx wlan0
Nov 29 10:06:03 dnsmasq-dhcp[1945]: DHCPDISCOVER(br0) xx:xx:xx:xx
Nov 29 10:06:03 dnsmasq-dhcp[1945]: DHCPOFFER(br0) 192.168.0.47 xx:xx:xx:xx
Nov 29 10:06:03 dnsmasq-dhcp[1945]: DHCPDISCOVER(br0) xx:xx:xx:xx
Nov 29 10:06:03 dnsmasq-dhcp[1945]: DHCPOFFER(br0) 192.168.0.47 xx:xx:xx:xx
Nov 29 10:06:03 dnsmasq-dhcp[1945]: DHCPREQUEST(br0) 192.168.0.47 xx:xx:xx:xx
Nov 29 10:06:03 dnsmasq-dhcp[1945]: DHCPACK(br0) 192.168.0.47 xx:xx:xx:xx wlan0
Nov 29 10:06:03 dnsmasq-dhcp[1945]: DHCPREQUEST(br0) 192.168.0.47 xx:xx:xx:xx
Nov 29 10:06:03 dnsmasq-dhcp[1945]: DHCPACK(br0) 192.168.0.47 xx:xx:xx:xx wlan0
Nov 29 10:09:18 dnsmasq-dhcp[1945]: DHCPDISCOVER(br0) xx:xx:xx:xx
Nov 29 10:09:18 dnsmasq-dhcp[1945]: DHCPOFFER(br0) 192.168.0.47 xx:xx:xx:xx
Nov 29 10:09:18 dnsmasq-dhcp[1945]: DHCPDISCOVER(br0) xx:xx:xx:xx
Nov 29 10:09:18 dnsmasq-dhcp[1945]: DHCPOFFER(br0) 192.168.0.47 xx:xx:xx:xx
Nov 29 10:09:18 dnsmasq-dhcp[1945]: DHCPREQUEST(br0) 192.168.0.47 xx:xx:xx:xx
Nov 29 10:09:18 dnsmasq-dhcp[1945]: DHCPACK(br0) 192.168.0.47 xx:xx:xx:xx wlan0
Nov 29 10:09:18 dnsmasq-dhcp[1945]: DHCPREQUEST(br0) 192.168.0.47 xx:xx:xx:xx
Nov 29 10:09:18 dnsmasq-dhcp[1945]: DHCPACK(br0) 192.168.0.47 xx:xx:xx:xx wlan0