Intelligent Temperature-Control Technology; Anti-Pid Effect Function (Optional); Introduction To Pid Effect; Pid Power Supply Mode Function Setting - Sungrow SG1250UD Operation Manual

Operation Manual

8.9 Intelligent Temperature-Control Technology

The inverter will continuously detect the IGBT temperature and adjust the fan speed
accordingly. When the module temperature is low, the inverter will decrease the fan speed
to lower the device noise and decrease the device operation consumption. As the module
temperature increases, the inverter will increase the fan speed for adequate ventilation.
The intelligent temperature-control technology can synchronize the speed of fan and
temperature of the IGBT module and thus optimize the module temperature and other
conditions.
8.10

Anti-PID Effect Function (Optional)

8.10.1 Introduction to PID Effect

Potential Induced Degradation (PID) of the solar modules is a performance degradation
caused by high negative voltage. The PID effect can occur with all crystalline silicon solar
cells that are embedded in glass-foil modules, leakage currents can result under
unfavorable conditions (accelerated by high humidity and temperature) where the module
joins with the frame and causes short-circuits that lower the overall performance of the
system.
This inverter is equipped with optional anti-PID function to effectively prevent the PID at the
inverter side.

8.10.2 PID Power Supply Mode Function Setting

For inverter with optional PID power function, the enable and disable of this
function can only be performed by personnel from Sungrow. Please contact
Sungrow if you need to switch this function.
Proceed as follows to set the mode if the PID power mode is enabled:
Tap "Function" from the default menu.
Step 1
Tap "Setting".
Step 2
Tap "Protect parameter" after entering the correct password.
Step 3
Click Next to find the page with "PID power mode" and select the mode by the drop-down
Step 4
list (Suppression/Repair).
Select according to the on-site situation.
8. Inverter Functions
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