# SolarEdge inverter: arc fault detected — what to do now

The inverter has detected a possible electrical arc in the solar DC circuit. Treat this as urgent. Switch the system off with the inverter ON/OFF switch, do not restart it repeatedly, and call a professional.

## What we see across our fleet

- We have seen this fault on 85 SolarEdge systems, 1% of the 8,871 SolarEdge systems we monitor (last 12 months).
- Once it appears, the system usually clears it in about 81.9 hours (median), and 0% clear within 24 hours.
- Replacement cases on record involve these SolarEdge models: U650-1GM4MRMU-A05 (371), USE11400H-USSKBEZ8 (365), SE7600H-USMNUBL75 (118), NX13000T-US00UCYN4 (84), SE10000H-USMNUBL75 (61).
- Source: Otovo fleet monitoring and service records, data through October 2026.

## Common causes

- A damaged or loose DC connection or wire.
- A failing connector or component in the solar array.
- Damage from weather, animals, or age.
- A false trigger, which only a technician can confirm.

## Safe steps to try

1. **Switch the system off** If it is safe to reach the inverter, turn its ON/OFF switch to OFF. Do not open the inverter or any box, and do not touch wiring.
2. **Do not restart repeatedly** Leave it off. Repeated restarts are not recommended for a possible arc.
3. **Note what you see** Record the alert in the app. Look for a burning smell or visible damage from a safe distance, and call emergency services if there is smoke or fire.
4. **Call a professional** Arrange an inspection before turning the system on again.

## When to call a professional

Otovo services these systems and can diagnose this fault for you. Call as soon as possible. A qualified technician needs to inspect the DC wiring before the system is restarted. Call 911 if there is smoke, fire, or a burning smell.

## Frequently asked questions

### Can I reset it?

SolarEdge refers arc fault errors to its arc fault documentation for professionals. Do not keep resetting it.

### Is it an emergency?

Treat it as urgent, since an arc can be a fire risk. Emergency services are needed if you see smoke or fire.

### Can I check the panels myself?

No. Do not touch panels, wiring, or optimizers.

Canonical page: https://otovo.com/repair/solaredge/arc-fault