I have a 30kW Hybrid unit including DC generator, 48V Li batteries, 3 x 10kVA Quattros in 3phase. The inverters are in inverter mode only and do not charge the batteries, the generator charges the batteries, controlled by a PLC. The inverter configured to cut off at low voltage setpoint.
I'd like to combine two of these units to serve a max of 60 kVA load , 3 phase.
Can I AC couple these systems ? Connecting inverter 1 of each unit to phase 1, etc. so I'd have 2 inverters on each phase, 20 kVA per phase?
Is this possible ? How would it be configured software ?
I realise normally two DC batteries can not be used if not on same DC bus, but does it matter if the inverter never charges the batteries ?