I was running a TP6048 (6000ex close relative) for about a year.
I'd suggest you ditch communications with the inverter, set your battery to user and run everything off voltage.
14 - USE
17 - 55.2V or close to it.
18 - 54V or close to it. (54.8V should balance the cells if you don't get a full charge daily and they start to drift).
19 - 44V or higher
20 - 51V (this is the highest you can go and should keep you around 25% soc)
21 - 53V (this will keep your grid use to a minimum, you can bump it up if you have bad weather coming or want to charge fuller from the grid)
There is a thread on here somehow that has lots of different users settings, search for LVX6048 settings or something along those lines.
Note that I never updated the firmware on my TP6048, everything worked well enough out of the box.