Off grid solar-26KW, 120KWh-Lifepo4, REC bms, Sunny boy, Sunny island, Neey active balancer.

My goal #1 when designing this system was to make it as simple as possible.
As Leonardo da Vinci once said:  Simplicity is the ultimate sophistication. :)
Here are the components I used:
72pcs-360W Q Cells solar panels or 26KW
128 Lifepo4 Lishen 272Ah battery cells  16S 8P configuration for the total of around 120 KW storage
3 Sunny boys 6.0-1AV-41      6KW each or total of 18KW  Max
2 Sunny islands 8.0 M-13      6 KW each both can handle 12KW for charging and discharging nominal, maximum of 16 KW for half an hour and 22KW for 3 seconds for discharging.
In sunny weather this system can power a consumer (machine) for up to 30KW single phase
REC bms + REC wifi module
NEEY active balancer
8 DC double pole 64A circuit breakers one for each battery bank
(after some consideration and the problems with the first BMS and talk with REC I found that there should not be a breaker on the Negative before the shunt. So now I use 6 double pole 64A circuit breakers one for each  of the 6 battery banks and 2 more 80A one pole breakers for the positive on the other two battery banks. Now the BMS is constantly connected to the negative via these two banks)
Fuse box with two 250A fuses for both Sunny islands.
500A simple Victron shunt
EV200ADANA 48 V  500A Contactor