On 2023/01/25 at 7:05 PM, Pierre-loiret said:

For the batteries  : As the two inverters are in parallel and the consumption is balanced between the two, I thought that I could only connect the BMS of 8 and leave the other 4 without connecting the BMS.

you can do that, I can't see any huge risk, but what would be great if you can set up a computer of sorts, assuming the software for the PC is available, with a CANbus or RS485 port and just regularly check up on the 4 that aren't talking to the inverter, to ensure that they are also happy about the state of affairs, otherwise, I guess 6 per inverter and let each inverter talk to the 6 connected to it, but parallel up all 12 batteries on the power side.. but not sure whether that would work properly, I'm guessing once an inverter becomes a paralleled slave, it may ignore BMS comms, but I don't know for certain...

as for the battery manufacturer, briefly looking at the poor excuse for a .pdf file, it seems you can parallel up 10 batteries, but I didn't look at it that closely

Edited January 26, 20233 yr by Kalahari Meerkat
grammatik

20 hours ago, Pierre-loiret said:

do you know what the role of "zeroexport power". this box defaults to 020 

that consumes 20W on each phase I assume, to try and prevent smart power meters from tripping, usually smart power meters are set up to prevent you, the consumer from feeding power back into the grid and here in this country, quite often if you push some power back into the grid, the smart meter may actually disconnect you from the grid, if this happens, then you may need to call the power provider to come and reset the meter...

in your case, you should be able to set the value to 0... specially since you don't have the current transformers in place...