Sungrow inverter shows Electric Arc Fault (code 88)

Code 88 means the Sungrow inverter detected arcing on the DC side, usually from a loose, damaged or burnt connector or cable. It stops to prevent a fire. The fault has to be found and repaired before it is cleared in the app; clearing it without a repair only hides the problem.

Sungrow Arc Fault 88 | Faisalabad, Lahore

What you will see

Code 88 and the inverter stays off
Brown or melted marks on connectors or cable ends
Crackling sound near the panels or inverter

Why it happens

A poor contact in a DC connector heats up and can spark. Mixed connector brands, water ingress and rodent damage are common causes.

Diagram

Repair first, then clear

Good connection

ConnectorTight, dry

→

InverterRunning

Loose or burnt

ConnectorSparking

→

InverterCode 88, stopped

Clearing code 88 without a repair only hides the problem.

Applies to Sungrow inverters with arc detection.

What you can check yourself

From a safe distance, look for burn marks on visible cables and connectors
Note any rodent activity on the roof

What not to do

Do not clear the arc fault in the app before a repair
Do not touch or unplug DC connectors

When to call us

Isolate DC safely and inspect every connector and cable
Replace burnt parts with matching connectors
Clear the fault only after repair

Connector inspections

We inspect and replace damaged DC connectors on Sungrow systems in Faisalabad, Lahore and across Punjab, including systems fitted by other installers.

Send us

the fault screenshot and photos of any marks on cables