Hi,
I have a 3 phase generator, can I connect a 10KVA quatrro to L1, 8KVA to L2. and they share a common 48V battery bank.
If they are going to be two completely independant circuits then it will work if they dont communicate with eachother - be careful with charge settings and current limits etc, as they are not aware of eachother so you need to take care of those scenarios. If you want the ph-ph voltage too then you need to link them and configure for 3 phase, and this wont work without a third unit, and they all need to be identical. if you chose a typicaly US 2 phase system I think you also need two identical units…
Hi Pieter, noted that can only use as 2 single phase unit to work with. Want to check what about the Cerbo? Can we use 1 Cerbo to control 2 unit?
Hi, want to check whether this kind of set up is it OK?
The BMS only communicate to one of the Quattro. And only 1 of the Quattro will charge the battery.
Hi Raymond,
No , I dont believe so. The cerbo communicates with muliplie units (probably via the master unit), when they are configured in 3 phase. Any one unit of the group having a problem will bring them all down.
2 single phase units running independantly each need their own Cerbo. The Cerbo commumicating wiht the BMS will have a few extra features and display the BMS info. The second system will still charge the battery according to the parameters in the Quattro… I suspect you might have seom trouble, especially wiht low level cutoff etc on the system without BMS info…
I would add another battery and know it would work perfectly as two independant single phase systems 
Hi Pieter,
Yes, we are running 2 single phase unit independently each with its own Cerbo.
The second system I am thinking of setting the charge parameter in the VE system to 0A to prevent charging by the second system.
The second system will take in the battery like lead acid battery where there is no information.
While the first system will read the remaining battery capacity.
Just wondering whether is there any issue with this.
It should work, are you using a grid meter and ESS? I am trying to think but you might be able to series connect 2 shunts and send communication from ea to their own inverter but connect both the neg to the most downstream shunt. That would pretty cool if it works.
I think you’ll be okay… I have 95x 3.55kWh pylontechs connected in parallel with another 95, not communicating to anything and it all just works… I do have some weird warnings when the BMS goes offline, but I have not investigated in detail as the priority is to get the BMS back up