We have 3ph 15kW quattros systems running off Generators to charge battery storage.
Currently 3 and 6 inverter 3ph systems.
It has been found that the firmware does not evenly distribute the load when ramping up charge current. The quattros currently have firmware version ...510.vff.
The system when started up currently loads up one phase at a time until it has reached its AC or DC limit. This results in badly unbalance phase loads on the Generator which in turn results in cycling of the charge load On and Off. the only ways found to reduce this is to turn down the maximum charge current or add external output loads. Even with this extra load added it is clear that the charge management in firmware is not attempting or succeeding to balance the either the charge loads or the loads on the input supply - this still (less often) results in charge cycling.
1.The charge loads need to be applied in small increments across all phases to maintain a balanced load on multi phased generators.
2. The Load management needs to also look at external loads and adjust the Charge Currents from each phase to balance the the total loads on each phase, as well as limiting the maximum total charge current. ie reduce charge on the phase with the highest total loads and increase Charge current on the Phase with the lowest total loads. You will also need to dampen these controls a bit for stable operation to filter out surge loads. ie (compressor starts)
If this is managed from the GX firmware then this will need to be updated instead.
