Fronius inverter no longer reachable from Hassio

Hi,

Just putting this out there in case anyone has some ideas.

Yesterday my hassio instance could query my Fronius inverter (using the Fronius component). Today it was returning no data.

Investigation shows that the ip address (.115) of the inverter is unreachable from hassio:

core-ssh:~# traceroute 192.168.0.169
traceroute to 192.168.0.169 (192.168.0.169), 30 hops max, 46 byte packets
 1  a0d7b954-nodered.local.hass.io (172.30.32.1)  0.017 ms  0.015 ms  0.011 ms
 2  192.168.0.169 (192.168.0.169)  8.135 ms  10.950 ms  5.531 ms
core-ssh:~# traceroute 192.168.0.115
traceroute to 192.168.0.115 (192.168.0.115), 30 hops max, 46 byte packets
 1  a0d7b954-nodered.local.hass.io (172.30.32.1)  0.017 ms  0.015 ms  0.011 ms
 2  *  *  *
 3  *  *^C
core-ssh:~#

From another device on the same wifi:

Daryls-MacBook-Pro:~ darylsargent$ traceroute 192.168.0.169
traceroute to 192.168.0.169 (192.168.0.169), 64 hops max, 52 byte packets
 1  192.168.0.169 (192.168.0.169)  24.302 ms  3.040 ms  3.592 ms
Daryls-MacBook-Pro:~ darylsargent$ traceroute 192.168.0.115
traceroute to 192.168.0.115 (192.168.0.115), 64 hops max, 52 byte packets
 1  192.168.0.115 (192.168.0.115)  88.195 ms  4.653 ms  5.762 ms
Daryls-MacBook-Pro:~ darylsargent$

Yes - I have rebooted the router, the hassio host - after the sun goes down I will reboot the inverter. There re are no internal firewalls etc.

Any thoughts?