I've read a lot and searched this forum as well as all the available downloads, but haven't found a definitive answer to this question (for an off-grid PV system to be installed in Arizona):
Using a BMS that can communicate a requested charge level (say in amps) to the Quattro via VE.Direct, can the Quattro be programmed to actively adjust its output frequency to control the power output of a grid-tied inverter (one that appropriately responds to frequency) to continuously achieve the requested charge level?
So far I've only seen info that states the BMS can command the Quattro to start or stop charging. But I'm asking about active variable control of the charging current when in inverter mode, via frequency control.
For reference, the BMS I have in mind is the Orion BMS2 by Ewert Energy. Its primary communications bus is CAN. Is there a straightforward way to couple between the CANbus and the VE.Bus or MODBUS of the Quattro? I think that is what the CCGX is for? Or better yet the Venus GX looks like it does this?
The system being designed will have 12KW of 60-cell PV panels, 48 KWHr of lithium battery, twin Quattro inverters (5KW to 10KW each; for split phase 240/120 it appears one must use two Quattros, 120V each, with their outputs in series; correct?), and either SMA or Fronius string inverters or possibly Chilicon microinverters. I believe all of these choices for AC-coupling the panel output can be set up to respond to frequency control.
At this point I don't necessarily need the details of HOW this would be programmed, but only WHETHER it can be done.