Hi guys,
Is it true that when there is high temperature on PV cell will have any impact on voltage? I saw it at youtube somewhere but cannot remember what is the link. I just need to know if it is true.

thanks.

regards.
Zul.

Yes the higher the PV temperature the higher lower the voltage, and less power.

From experience, yes -though a cooling breeze underneath the solar panels does help.
Most surface mounts allow air to flow underneath the panels.