That looks amazing!
I'm upgrading my system a bit so if you don't mind I've got two questions for you about the MCCBs and the fuses on your battery setup (as this topic always messes with my head!)
On the right power bank, you've got the system set up so that the positive goes:
Busbar -> Fuse -> MCCB -> cells
Whereas on the left it goes:
Busbar -> MCCB -> Fuse -> cells
Did you intentionally move the fuse position between the 2 sides?
If so, what was the reason for that? (Does it even matter?)
The second one is about the MCCB itself.
I think I have the exact same model as you, and I'm curious about the orientation you're using.
I was under the impression that those MCCBs "worked" with power in both directions (in/out), however, they would only trip in an over-current/short circuit situation if the power flowed from top to bottom (top in, bottom out). Do you know if this is correct or not?
This goes back to the previous question, you've flipped the orientation of the MCCBs between the left and the right banks. If my theory (above) is correct then, if the battery has a short, the MCCB on the right should trip before the fuse blows, whereas on the left the fuse blows and the mccb does nothing. Where as if there is an issue with the power in (e.g. inverter goes nuts somehow), then it's the other way round.
*Btw, if I'm completely completely wrong, please tell me!