So now that this thing is working as I need it to, I probably won't mess with it anymore, but I should note a few things..
- Once again this is dangerous and should only be attempted with extreme caution and only by those who are comfortable to do so.
- I added a XT60 connector to the inverter power lines and a simple wire connector to the 'com' line to allow it to work with my different battery options, this was not mentioned in the work logs but I also built adapters for my other battery options to allow them to connect using this standard.
- This likely messes with some / all of the fault states so its likely not nearly as safe as it was originally.
- It would still be nice to reverse engineer the communication protocol so this would be easier for others to use without having to dissemble an inverter and solder in a resistor.
- It might be fun to revisit this at some time in the future and add an ESP microcontroller just for fun to add some remote control capability.

Happy Hacking!