Those look pretty clean as is!

I have two of the older eg4 inverters that I still havent finished hooking up. Have 14kw of solar but got tripped up with the SPD's and wiring so its just sitting there unfinished.

Do you have any videos or tutorials that helped you wire yours?

I'd probably just have them run a critical loads panel and maybe back it up with city AC as well as a battery bank fwiw