What if I have 3 phase power supply, how does your system work with three-phase supply?

An inverter is required for each phase that requires backup power.
One can combine three inverters, and then set up communication between them to create a three-phase supply.
But as inverters can be costly, we recommend the following: Only install one inverter to supply one of the three phases with have backup power. So the other two phases will have no backup power.
Then move all the essential loads that must be backed up, to this one phase. The high consumption equipment such as geysers and ovens can be left on the other two phases.