I have 2 Sunny Island's, 1 is master 2nd is slave. Master creates the grid, slave follows and copies, the PV Inverters latch onto the SI grid react to the frequency shifting the SI's produce.
The SI's have closed loop with JK BMS via canbus, as the battery approaches 100% the BMS tells the SI's to limit charging amps and the SI's in turn limit the PV production to meet the lower charging amps.
