Arc detected — Grid power feed interrupted due to fault

What does Arc detected mean?

The inverter has detected an electric arc, indicating a fault on the DC side. This safety measure interrupts the grid power feed for at least 5 minutes to prevent overheating and fire risk. If multiple arcs are detected within 24 hours, the grid power feed can be permanently interrupted until manually reconnected.

• Faulty or incorrect DC installation.
• Poor plug connections or contact errors on the DC side.
• Faulty insulation in the PV system.
• Active PV module electronics (e.g., power optimizers) impairing the Arc Fault Circuit Interrupter (AFCI) function.

Click steps to track your progress.

1. 1

   Carefully check all DC plug connections to ensure they are correct, secure, and free from damage.

2. 2

   Repair any faulty insulation correctly and in line with installation instructions.

3. 3

   Ensure all DC connection work was performed according to the inverter's installation guidelines.

4. 4

   If the issue persists or multiple arcs are detected, a manual reconnection may be required after resolving the underlying cause.

5. 5

   Consider if any active PV module electronics are affecting the AFCI operation.