It is really easy to daisy chain delta inverters together. The instructions below apply to all RPI models, although the same logic can be applied to the Solivia models.
Before interconnecting the inverters, make sure that each unit has a unique ID number.
This is so that the monitoring or computer device can differentiate between inverters.
Given that the maximum ID number is 31, you can daisy chain a maximum of 31 inverters at the time. Lastly, ensure that the last inverter in the chain has the terminal resistor switched ON.
Please follow the example image below to connect the units.
Notice that different models will have a slightly different communication card but all of them contain a common terminal block used for communication.