Single Phase Quattro and Three Phase Mulitplus II connected to same battery

DIY
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Hi All (Unusual Setup)

We currently have the following off grid system:
1 X Quattro 48/15000/200-2x100
2 X SmartSolar MPPT RS 450/100
6 X BMS 48v 15kw Lithium Batteries
1 X Cerbo GX MK2

1 X Single Phase Generator (Connected to Quattro as Generator).
1 X Three Phase Generator (Connected to Quattro as Mains - only one phase).

The issue we have is when the three phase generator is running, the phases are not balanced as we only have one Quattro connected to one phase.

Suggested solution, is to install three Multiplus II 48/1000. One connected to each phase of the three phase generator. This will balance the phases and also give us additional charging capacity when the 3 phase generator is running.
Initially they will be connected as chargers only.
But later on, we hope to be able to power some 3 phase equipment direct from the Multi’s.

Just to clarify, completely off-grid, single phase generator only used when batteries are low. Three phase generator used during the day, to run welders, lathe and additional equipment. Only the Quattro is currently being used as an inverter. All connected to the same battery bank (which is connected to the Gerbo GX).

Question, what is the best way to configure the system, once the 3 additional Multiplus’s are installed. Have been advised to connect the 3 Multi’s via a MK3-USB to the Gerbo GX. Will this limit functionality? Is it possible to connect everything directly to the Gerbo if the Multiplus’s are only used as chargers?

Thanks in advance for any replies and advice.

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I guess you mean 3x MP2 48/10k since theres no 48/1000.

For almost the same money you can get two Quattro 48/15k and make it a proper triphase install. You can also charge a triphase system with only singlephase input, you need to disable the option for the three units to switch together, so one Quattro can switch to gen and charge while the others keep inverting

While it is possible to use MP2s on the side just as chargers, its always going to be a hack. The Cerbo is designed to control one inverter(-system) and one battery/BMS. You can use a second Cerbo and pass the BMS-Can through to it, but thats all unsupported

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