We have a weak 3 phase diesel genset what suffers from asymmetric 3 phase loads. According the 1:1 rule, there are 3 MP2 in star connection with sufficient power to complement missing loads with battery charge currents. Assume, the setup requires any electricity meter (our dealer has ABB on stock) with RS485 at generator output, how can I setup the MP2 to balance the phases over the batteries DC busbar ?
Nothing fancy is needed, the input current limit should be the same on all phases. Use the GX and set it that way. This will regulate the AC loads off your generator.
The inverters will power assist the phases that are higher in load, and charge if needed on the other phases. All the while keeping the load at the same level on all the inputs.
The system does not regulate over DC bus bar. That should be wired for good current sharing and have one central battery bank.
