Hi,
I'm currently design my ac coupled system (without grid):
-3x10kW fronius symo (1pcs with data manager and 2 pcs light version)
-3xquatro 48/10000 for 3 phase config
-4x4banks US2000-2.4kWh pylontech battery bank (4pcs 48V parallel for 1 conection / 4 connections in total)
-Venus GX control
My questions are:
1. For Fronius inverter, it's a must to have datamanager on each inverter? Or I can use solar.net protocol with 1 master with datamanager and 2 slaves.
2. Can I use quatro inverter to charge the battery bank when I have power from Fronius inverters? Or, do I need MPPT DC coupled system mandatory to change the battery bank?
3. Concerning CAN bus from Venus GX device, will be possible to communicate to all 16 battery module? Or I need another device (in this case, which one)?
4. also, will be a problem if, in the instalation site, we have no internet connection; for commisioning we will have temporaly internet connection, of course, but with week signal.
My design principle was starting from schematic below:
Thank you for your answer.