Delta RPI M30A Operation And Installation Manual page 22

Wiring
PV Array
Must install a
transformer
Isolated
transformer
To
Utility
Inverter
3Ph,
3Ph,
400Vac
400Vac
AC Wiring
1
Figure 4-6 Plus or minus grounding wiring of M30A_121
Do not enable the PID function and set
the insulation with "Plus Grounded" or
"Minus Grounded".
DC Distribution box
(Plus-GND or Minus-GND)
22
Z
or
Z
DC Wiring
2
Must be Parallel
Connection
Communication
3
Wiring