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.
Safety: act now
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
- 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.
- Do not restart repeatedly Leave it off. Repeated restarts are not recommended for a possible arc.
- 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.
- 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.
Other SolarEdge faults
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- SolarEdge inverter: DC isolation fault — what it means and what to do
- SolarEdge power optimizer: no communication — what it means
- SolarEdge inverter: production issue detected — what to do
- SolarEdge inverter: no site communication — what it means and what to do
- SolarEdge inverter: no communication with the meter — what it means
- SolarEdge inverter: no communication with the inverter — what to do
- SolarEdge inverter: grid voltage error — what it means and what to do
- SolarEdge inverter: external fan fault — what to do