SolarEdge is one of the most widely installed string inverter platforms in the U.S., and its display and monitoring app report faults through numbered error codes. Exact codes can vary by inverter generation and firmware, so always note the exact code shown before calling for service.
How to Find Your Error Code
SolarEdge inverters show a code directly on the front LCD screen, or through the SolarEdge monitoring app under “Site Info” or the layout view, where affected optimizers or the inverter itself will flag red.
Common SolarEdge Error Codes
| Display Message / Code | What It Means | Severity |
|---|---|---|
| Off / No Production (Grid Fail) | Utility voltage or frequency is out of range. Inverter idles until grid conditions are stable. | Low – usually self-clears |
| Error 16x (Isolation / Ground Fault) | Loss of isolation resistance between the DC circuit and ground, frequently from wiring damage, moisture intrusion, or connector degradation. | Safety hazard |
| Error 8-11 / 8-12 (Arc Fault Detected) | The inverter’s AFCI circuit detected a potential DC arc condition. | Safety hazard |
| Error 3-15x series (Optimizer Communication / Pairing Fault) | One or more power optimizers aren’t communicating with the inverter – often a failed optimizer, damaged panel-level wiring, or a pairing issue after panel work. | Moderate |
| Error 25x (Temperature-Related Fault) | Inverter has throttled or shut down due to internal overheating, common in units mounted in direct sun or with blocked ventilation. | Moderate |
| Solid Red LED, No Code | Often a hard internal component failure (fan, capacitor, or power board). Common in HD-Wave units after 8+ years of service. | Moderate-High |
This covers the fault categories homeowners encounter most often. SolarEdge’s full documentation lists additional codes specific to certain inverter generations and firmware versions – if your display shows a message not listed here, note it exactly and a technician can look it up for your specific unit.
Ground Fault and Arc Fault: Why These Codes Are Different
Most inverter fault codes affect performance – annoying, but not dangerous. Ground fault and arc fault codes are different. Both are safety detections built into the inverter specifically to catch conditions that can cause electric shock or start a fire, and both deserve a faster response than a typical production drop.
An isolation/ground fault (Error 16x) means current is leaking outside its intended path, most often through damaged wire insulation, water intrusion, or a compromised connector. An arc fault (Error 8-11/8-12) means the inverter’s AFCI circuitry detected current jumping across a gap instead of flowing through an intact conductor – arc-fault protection has been required on residential PV systems since 2011 under NFPA 70, Article 690.11.
Resetting the inverter will often clear either code and let the system restart production. That reset does not fix anything – it only clears the fault flag. If the underlying wiring damage, moisture intrusion, or failed connector is still there, the condition can recur, sometimes without being safely detected and interrupted the next time. Repeatedly resetting a system that keeps throwing a ground fault or arc fault, instead of having it inspected, is how a manageable wiring issue turns into a safety event. If your system displays either of these codes, treat it as a signal to schedule a diagnostic inspection – not a nuisance to click through.
Repair or Replace?
SolarEdge string inverters carry a standard 12-year warranty, extendable to 25 years if registered. If your unit is within warranty, replacement is typically covered – but you’ll need documentation from a licensed technician to file the claim. Outside of warranty, repair is often viable for optimizer-level faults; full inverter replacement is more common for internal component failure.
Important Safety and Liability Notice
This article is provided for general informational purposes only and does not replace a professional, on-site diagnosis. Solar inverters operate at high DC and AC voltages and involve real fire and shock hazards; do not open, probe, or attempt to repair internal inverter components yourself. ElectriCare, Inc. makes no warranty as to the completeness or current accuracy of manufacturer error codes referenced here, which vary by model, firmware version, and installation, and assumes no liability for property damage, injury, or system damage resulting from actions taken based on this content. If your system displays a ground fault, arc fault, or any code you’re unsure about, do not repeatedly reset the inverter to clear it – contact a licensed technician for evaluation.
Related Reading
- Inverter Errors and Failures: Complete Troubleshooting Guide
- Solar Arc Fault Errors: Causes, Risks and What to Do
- Your String Inverter Is Failing: Repair, Replace, or Upgrade?
Get Your SolarEdge System Diagnosed
ElectriCare technicians service SolarEdge systems regardless of who installed them, including warranty claim support and optimizer-level replacement. Ground fault and arc fault calls are treated as priority service.
Schedule SolarEdge Inverter Service →
Sources and Further Reading
- SolarEdge Official Support & Documentation
- NFPA 70, Article 690 – Solar Photovoltaic Systems
- CALSSA – California Solar and Storage Association