The short answer
SolarEdge says a red LED on the inverter indicates an error, and that you can see error details in the mySolarEdge app or monitoring platform. Their advice to system owners is to contact the installer, who can check the system remotely, and to have the exact error from the app, screen or LEDs ready when you call. SolarEdge’s error-code guide is written for installers: most corrective steps involve testing voltages or changing settings, which homeowners should not do.
Safe checks you can do now
- Find the code
Open the mySolarEdge app and check inverter status, or look at the inverter’s LEDs and screen from where you stand. SolarEdge says a red LED indicates an error. Source: SolarEdge: Verifying inverter status.
- Write down the exact code and time
Codes look like
2x11or18x21. Copy every character, take a photo of the screen or app, and note the date, time and weather. SolarEdge asks for this information when you contact support. - Check whether production stopped or just reporting
If the app shows no new data, SolarEdge’s guidance for owners is to check the inverter’s communication light, confirm your router is on, and update the Wi-Fi password if you changed it. Source: SolarEdge: mySolarEdge app does not display production data.
- Look for an outage or grid event
Several codes relate to grid voltage or frequency. If neighbours also lost power or your utility reported an outage, note that for your installer.
- Contact your installer with the code
SolarEdge says that if the LED is red, contact your installer, who can check the system remotely. Do not open the inverter, switch DC isolators or change country settings yourself.
Only do the checks on this page that need no tools: read the app, look at the inverter or gateway lights, reset a tripped breaker that is labelled for the solar system or gateway, and look at the array from the ground. Never open an electrical panel, inverter, combiner or junction box, never touch wiring or connectors, and never climb onto the roof. Solar equipment can stay energized while the sun is up even when the grid is off. If a breaker trips again, you smell burning, or you see scorch marks, water in equipment or damaged wiring, stop and call your installer or a licensed electrician.
Common SolarEdge error codes, as SolarEdge describes them
Meanings below come from SolarEdge’s Inverters Error Codes and Troubleshooting user guide (SolarEdge: Inverters Error Codes and Troubleshooting, user guide v1.2 (PDF)). The corrective steps in that guide are for qualified installers. The homeowner column is our own safe-action advice, not SolarEdge’s.
| Code | SolarEdge’s description | Installer-level steps in the guide | What a homeowner can do |
|---|---|---|---|
2x11 | Over temperature | Verify proper inverter clearances; make sure the heat-sink fins are clean and unobstructed. | From the ground, check nothing is stacked against or covering the inverter. Report the code. |
18x21 | Grid voltage above the country limit (AC voltage too high) | Verify the country setting, measure AC grid voltage with the inverters off, consider wire gauge; consult the grid operator. | Note whether it happens at midday or during grid events. Report it to your installer; they may involve your utility. |
3x9A | Device locked, by human intervention or automatically by a safety feature | Try turning the device off and on to reconnect; contact support if it persists. | Do not cycle switches unless your installer walks you through it. Report the code. |
2x1A / 8x59 | Isolation fault: the PV array is not properly isolated from ground | Electrical isolation testing of the array. | Stop. This is an installer or electrician job. Do not touch the array, wiring or inverter. |
Only codes we could match to SolarEdge’s own documentation are listed. Code formats differ by inverter generation, so always quote the exact code from your app or screen. For any code not listed, contact your installer or SolarEdge support.
When to call your installer or an electrician
- Any red-LED error that does not clear by itself.
- An isolation or ground-fault code.
- Repeated over-temperature or grid-voltage codes.
- Any code you cannot find in SolarEdge’s documentation.
If you are not sure, treat it as a job for a professional. Our free remote review can help you decide what to ask for, but it does not replace a licensed electrician or your installer.
Get a free remote review of your system
Tell us which monitoring app your system uses (SolarEdge). We send you the steps to add our team as a viewer or installer from inside the provider’s own app. You never share your password with us. Once access is granted, our team connects your system and runs a free remote review of your production and alerts, then tells you what we found and the next step.
- 01Tell us your monitoring brand
- 02Grant viewer or installer access in your app
- 03Our team reviews it and reports back
Remote data can show when and where production changed, but it cannot always find the physical cause. Some issues need an on-site visit or your installer. We never ask for your monitoring password.
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Questions homeowners ask
Where do I see my SolarEdge error code?
SolarEdge points owners to the mySolarEdge app’s inverter status and to the LEDs on the inverter, where a red LED indicates an error. The monitoring platform also lists errors with more detail.
What does SolarEdge error 2x11 mean?
SolarEdge’s troubleshooting guide lists 2x11 as over temperature. The installer steps are to verify inverter clearances and make sure the heat-sink fins are clean and unobstructed.
What does SolarEdge error 18x21 mean?
SolarEdge’s guide describes it as grid voltage above the country limit. The installer steps include verifying the country setting and measuring AC grid voltage, and sometimes consulting the grid operator.
Can I reset a SolarEdge inverter myself?
SolarEdge’s corrective steps are written for installers. We recommend reporting the exact code to your installer rather than switching or opening equipment yourself.
Related guides
Sources
- SolarEdge: Verifying inverter status
- SolarEdge: Inverters Error Codes and Troubleshooting, user guide v1.2 (PDF)
- SolarEdge: mySolarEdge app does not display production data
- SolarEdge: PV production and system issues
Brand-specific facts and error-code meanings come from the manufacturer’s own documentation, linked above, checked 2026-10-09. Manufacturers update their guidance; follow the current version for your equipment. Published by Solar Survey AI. Our safe-action advice is our own, not the manufacturer’s.