Question Need firmware update for 12000XP? - PV input not working correctly

I also seem to have hit this same issue using the 12000XP.

My flow:

1) Turn on inverter
2) Mostly seems to be working
3) Get dongle setup, good also working
​4) Can't find gen boost setting, despite manual, decide I need firmware update

​5) Update firmware via website
​...
6) Inverter restarts, house/wifi router lose power
7) Inverter is now in Standby mode.
8) Dongle seems to be unable to connect to the internet
9) App / Website report the inverter as offline

Only hope so far is that I can do the 'locally connect' option while on the dongle's wifi network, but not sure if any of those changes are useful.

I recommend contacting support via their sites contact form. This basically just emailed me a phone number which I called and got great help. My cause in the end seemed quite specific to my situation: My Android phone didn't show the 12000XP firmware for updating. Switching to an iPhone allowed me to select 12000XP in the dropdown and see/install the latest firmware.

Also, I hadn't quite connected all the dots, but you CAN off grid install, I believe the poster above may have figured this out too, by first prepping and downloading the firmware in the app, then connecting your phone to the WiFi dongle and installing the firmware, regardless of your internet connection at that point.