SolarEdge Inverter Error Codes: SE Series Guide

Quick Answer

SolarEdge inverters report fault codes via the LCD screen or SetApp. Critical errors like 18XF5 and 18XB5 indicate internal hardware failures that usually require professional service or a warranty replacement.

SolarEdge systems rely on tight communication between power optimizers and the central inverter, and when something breaks that chain, you get a fault code. Ignoring a recurring code is a bad idea because some of them mean your system's been silently not producing power for days. Honestly, half the time I show up it's a grid hiccup or a dead WiFi connection. But the other half it's a failing optimizer or a warranty replacement situation, and the sooner you know which, the better.

SolaredgeInverter

About These Solaredge Inverter Error Codes

Seeing a red light on your inverter can be stressful, but not every code means a total replacement. I've found that a ton of communication errors are just a dropped WiFi signal or a loose Ethernet cable. This guide breaks down which codes you can handle with a simple power cycle and which ones mean you need me to come out with a multimeter and a warranty claim form.

Most Common Error Codes

Grid frequency out of range (2XB)40%

DC injection fault - hardware failure (18XF5)24%

Internal component failure (18XB5)14%

Communication or network fault (03X9A)12%

AC contactor failure (18XB7)10%

Symptoms You May Notice

The inverter LCD is showing a red fault screen with an alphanumeric code you've never seen before.
Your monitoring portal shows zero kilowatt production for hours or even days and nobody noticed because the house lights still work fine.
Red LED on the front of the inverter is solid or blinking instead of the normal steady green.
SetApp is refusing to connect or throwing an error status when you try to check in on the system.
Your electricity bill jumped noticeably and you're not sure why. Honestly, that's how a lot of homeowners first figure out something's been wrong for weeks.

Tools Required for Diagnosis

SetApp (free mobile app, iOS and Android)SolarEdge monitoring portal loginPhillips #2 screwdriver (for cover panel access)Multimeter (licensed electrician only)Phone or tablet with WiFi for SetApp connection

How to Identify Your Error Code

Frequently Asked Questions

How do I read SolarEdge inverter fault codes?

You've got two options. The LCD screen shows a code directly, but SetApp is way more detailed. If your inverter doesn't have a screen, hold the P switch on the bottom to wake up its internal WiFi hotspot, connect your phone to it, and open SetApp. The app gives you real-time status plus a full fault history. I also always check the Layout tab in the monitoring portal because it'll show you if the error's isolated to one specific panel zone, which cuts diagnostic time way down.

My SolarEdge inverter shows a fault but restarted itself. Should I be concerned?

It's actually normal for a SolarEdge unit to self-heal from grid errors. The inverter's designed to disconnect when utility power gets messy to protect your home's electronics. If it happens once in a blue moon, don't sweat it. If you're seeing it daily or multiple times a week, the inverter's voltage or frequency window might be set too tight for your local grid conditions. That's usually a quick remote fix for a technician with installer-level access, so call your original installer and ask them to check the config before scheduling a truck roll.

Can I reset a SolarEdge inverter myself?

You can definitely do a basic power cycle. But these aren't like rebooting a router. They need time. I've watched homeowners get impatient and flip the switch back and forth, which stresses the internal relays and can make things worse. Don't do that. Follow the proper sequence: AC disconnect first, then DC switch on the bottom of the unit, wait a full five minutes, then DC back on followed by AC. Then be patient while it cycles through Isolating and Grid Monitoring phases before it starts producing. The whole process can take 10-15 minutes easily.

Does a SolarEdge fault mean my solar panels are damaged?

Almost never, in my experience. The panels themselves are really hardy. What usually fails is the optimizer, that little black box bolted under each panel. If you're seeing 03X9B, one of those optimizers probably died. They're replaceable and not that expensive. If you're seeing a Ground Fault or Isolation error, that's more concerning because it usually means a nicked wire or water intrusion at a junction box somewhere on the roof. Still not a dead panel, but you'll want someone up there with a multimeter to track it down.

How long is the SolarEdge inverter warranty?

Standard warranty is 12 years, extendable to 20 or 25 years if the original owner registered it. If you bought a house with an existing system, the warranty usually transfers with the equipment, not the original owner. Check the sticker on the side of the unit for the manufacture date. One thing people don't realize is that while the inverter replacement itself is typically covered, most installers will still charge a labor fee for the swap, and that can run a few hundred dollars depending on your location and how easy the unit is to access.

Why does my SolarEdge inverter keep showing the same fault code after I reset it?

If the exact same code comes right back after a proper reset, the issue isn't a fluke. It's a real hardware or configuration problem. Hardware codes like 18XF5 and 18XB5 almost always return immediately after a reset because there's nothing a power cycle can do for a failed circuit board. For grid-related codes, they'll come right back if the underlying grid condition hasn't changed. Log the timestamps, call your installer, and ask them to pull the full fault history from the monitoring portal before they schedule a visit. That history can tell them a lot before anyone even drives out.

Related Solaredge Inverter Error Codes

Code: 2XBSolarEdge Inverter 2XB Error Code: Grid Frequency Out of Range Code: 18XF5SolarEdge Inverter 18XF5 Error Code: DC Injection Fault Code: 18XB5SolarEdge Inverter 18XB5 Error Code: Internal Hardware Fault Code: 18XB7SolarEdge Inverter 18XB7 Error Code: AC Grid Contactor Fault Code: 03X9ASolarEdge Inverter 03X9A Error Code: Communication Failure Code: 03X9BSolarEdge Inverter 03X9B Error Code: Power Optimizer Communication Error Code: 3X2SolarEdge Inverter 3X2 Error Code: AC Voltage Out of Range

Models Known to Experience HUB Errors

This repair applies to most Solaredge inverters with this error code. Common model numbers include:

SE7600H, SE10000H, SE6000H, SE3000H, SE5000H, SE3800H, SE11400H, SE7600A

Written by

Sarah Kim

Smart Home & Specialty Appliance Tech · 12 years experience

Last verified for technical accuracy on March 14, 2026