Second Victron ESS as Backup-System

[NEOTCO]

May you can help me, look here

How to combine 2 3P Victron Systems without Grid

Hi, I have one 3P System Victron Multiplus I 24/3000/70 with Cerbo and Battery System. I have also one 3P System Victron Multiplus II 48/8000/110-100 with Cerbo and Battery System and MPPT Chargers. I have no Grid. How can i combine them to work. I would prefer Main System AC2 OUT → AC IN Secondary system to charge when SOC is over 95% i can do this with Relais overs VEConfig. Secondary System AC OUT → AC In Primary system when load is high. How can i do this, do i need to change Grid codes? …

i need to know how to wire before prgramming

thank you