Time to check your wiring.
Got volts at the BMS output terminals?
Also, did you turn on the BMS? EDIT The "control" button, bottom right of the screen, might do something.
And then ...
My own experience (from that thread): -
Back in the late 90's I was working in Hong Kong on the airport express line (just before Chek Lap Cok-up opened). A Chinese guy was having a hell of a time drilling a wall to put up some sort of signage. Yes, he too had the drill in reverse, never had the heart to tell him (face and all that) but when we were back at that station two days later the sign was sitting forlornly on the floor, it could be there to this day.
Ours are at more of an angle, been like it for 12 years ????
Ater a while the wires go tight and it stops moving
Nothing to stop you having a moan at the local PEA office, they might even do something (I think I saw a Gloucester Old Spot just pass my window).
Looks pretty good.
Do you have a charger or power supply that goes to 60V or so? If possible, give it a charge to 58V (3.65V per cell) overall and leave for a little while (days) for the balancer to do its job.
Yeah, just export your earth from CU1 to CU2, just one rod and one N-E bond.
I would feed the 10mm2 to CU2 with a 50A breaker to give some discrimination but in the event of a short all bets are off as to which MCB will actually open first.
@sometimewoodworkerhas covered everything else I think.
Warning Jock Robinson ...
https://www.thesun.co.uk/fabulous/9727432/bride-punches-kilt-wearing-husband-skid-mark/
The groom left an "unsightly smear" on his bride's dress when he "perched his poorly-wiped behind" on her knee
Long, long ago a group of us were on a beach in Phuket with our "rentals" from the previous evening when I had an "escape"! (cut-off jeans were a little too short)
All that happened was a load of giggles from the girls and an interrogation of my "friend" ("Fish" from the Star Bar on Bangla Road IIRC") as to whether it worked as well as it looked! Confirmation was given
"Bill, we've got to stop it, or someday someone will telephone the planet Earth and get the answer, 'Honest, boss, there's nobody here anywhere but us complicated thinking machines!' "
Isaac Asimov - "Nobody here but" 1953.