Goodwe UT Series - Page 12

8
03 Product Introduction
For Re-
view
User Manual V1.0-2023-03-20
Replace the fan on-grid
Disconnect a single inverter from the utility grid and change its fan, which means the power
generation of other inverters in the power station will not be inuenced.
Potential Induced Degradation (PID, optional)
When the inverter is connected to the grid, the potential dierence between the negative pole of
the PV array and the module frame decreases the energy generated by the PV modules. That is
the PID eect.
• Anti-PID function
The inverter rises the voltage of the negative pole of the PV array to ground through the PID
module. When the voltage to ground is close to zero, the PID eect is suppressed.
• PID recovery function
The inverter rises the voltage of the negative pole of the PV array to ground to approx. 1/2 DC
BUS voltage through the PID module to recover the PID eect.
Anti-PID function and PID recovery function can work properly only when the inverter is applied
to an IT system.