There is a new product available which allows the inverter to better address loads on the other two phases - i.e the inverter may be on Red, and you have a 3-phase air-con on Red, White and Blue
The SM3000 Smart meter allows the inverter to produce more energy (where available via PV) and export it to offset import on the other 2 phases, where it sees that they are importing for a house load like an aircon or pump.
This effectively nets off at the meter and saves you more!