Sungrow PV Grounding Fault | Faisalabad, Lahore

Sungrow inverter shows PV Grounding Fault (1600–1615, 1632–1655) or System Hardware Fault (1616)

Short answer

These are serious faults. A PV Grounding Fault means a solar string is touching earth somewhere. Code 1616 means a hardware fault inside the inverter. Sungrow warns not to switch off the DC switch or unplug PV connectors while current is flowing, and not to power the inverter up again after 1616. Leave the system as it is, keep people away and call an engineer.

What you will see

Code between 1600 and 1655 in iSolarCloud
Code 1616 System Hardware Fault
Possible burning smell or marks near cables

Why it happens

A damaged cable or panel can let DC current flow to the frame or roof. Pulling a connector or switching DC under that current can draw an arc.

1616 means the inverter itself has found a hardware problem and should not be restarted.

Diagram

Serious fault: leave the DC side alone

01Code 1600–1655 or 1616 appears
02Switch off the AC breaker if safe
03Do not touch the DC switch or connectors
04Keep people away, call an engineer

After 1616, do not power the inverter up again.

Sungrow warns that switching DC under current is dangerous.

What you can check yourself

Switch off the AC breaker for the inverter at the board if safe to reach
Keep children and staff away from the inverter and roof cables
If there is smoke or a smell, leave the area and call for help

What not to do

Do not switch the DC switch off
Do not unplug MC4 connectors
Do not restart the inverter after code 1616

When to call us

Measure DC current and isolate only when safe
Find and isolate the faulty string
Insulation test and repair before reconnecting
Arrange Sungrow warranty assessment for 1616

Urgent faults

Message us on WhatsApp with the code and a photo. Our engineers in Faisalabad and Lahore will advise how to keep the system safe until someone reaches you.

Send us

the code, a photo of the inverter screen, and whether there is any smell or visible damage