Hello!
I am a new member here, but i often come across to read interesting discussions on this forum.
I have set up a solar system 5 years ago ( 20 Panels that are connected in series ) everything is up and running but a few weeks ago i started getting
an earth Fault error on my string inverter, i performed recently an insulation resistance test and could identify the position of the fault in the string (the ground fault is between 11 and 12th panel !) so it's quite in the middle of the string ( the VOC voltage at the 12th panel is expected to be 396 V )
The panels are installed on the roof and are a little bit difficult to reach, i think one MC4 connector is damaged and needs to be replaced.
I am concerned on how i can replace that MC4 connector, as i've never unplugged/plugged MC4 under daylight, i am aware that MC4 should never be unplugged under load!
is it safe to unplug the MC4 Connector just after opening the circuit at the inverter level (unplugging String's DC wires from the inverter ) ?
I am a new member here, but i often come across to read interesting discussions on this forum.
I have set up a solar system 5 years ago ( 20 Panels that are connected in series ) everything is up and running but a few weeks ago i started getting
an earth Fault error on my string inverter, i performed recently an insulation resistance test and could identify the position of the fault in the string (the ground fault is between 11 and 12th panel !) so it's quite in the middle of the string ( the VOC voltage at the 12th panel is expected to be 396 V )
The panels are installed on the roof and are a little bit difficult to reach, i think one MC4 connector is damaged and needs to be replaced.
I am concerned on how i can replace that MC4 connector, as i've never unplugged/plugged MC4 under daylight, i am aware that MC4 should never be unplugged under load!
is it safe to unplug the MC4 Connector just after opening the circuit at the inverter level (unplugging String's DC wires from the inverter ) ?