We had this issue some time ago and never resolved it. A problem on site yesterday has prompted me to revisit this.
We have a 3 phase system with 3x 5kw Quattros. 48v system. Lead Acid approx 5 / 6 yrs old.
Backup power for essential services.
Blue power panel was connected to the last Quattro in the chain - and also into a Battery monitor for generator control.
All was fine on original install, but at some point, connecting the BPP to the VEbus chain caused the Quattros to shut off. When not connected they would work as normal.
The BPP was replaced, but the replacement also caused the same issue.
Any ideas ?