SolarEdge Error Codes and Alerts Explained | Tampa Bay

SolarEdge error codes and alerts tell you what your inverter is seeing. No communication means the system has lost its internet link, OFF mode means someone switched the inverter off, islanding (codes 40, 2x28, 144, 2x90) means the grid is down or unstable, and isolation faults (25, 2x19), arc faults (147, 150, 151, 3x11, 2x96, 2x97) and a red light all need a licensed technician. A homeowner can safely check the app, check the home internet, restart the Wi-Fi router, check whether the utility power is out and wait for the system to retry. Everything else is a job for a technician. Fused Solar and Roofing is a licensed roofing (CCC1331058), electrical (EC13014750), and building contractor (CBC1252064) — all three in-house.

Before anything else, one rule covers every alert in this post. Never open, unscrew or remove any cover on an inverter, battery, disconnect or electrical panel, and never touch wiring or go on the roof: solar panels make electricity whenever the sun is up, even with the system turned off. If you notice smoke, a burning smell, sparks, heat, buzzing, melting, water on or in the equipment, or visible damage, stay away from the equipment and keep children and pets away. Call 911 if there is smoke or fire, then call for service. Do not try to troubleshoot it.

This post covers SolarEdge HD-Wave and SetApp inverters, the Home Hub and the Energy Bank battery, no matter who installed your system.

1. A Quick Reference List of SolarEdge Codes and Alerts

Here is each alert in this post, what it means, and who handles it.

• No communication with the site / with the inverter / app shows no data: internet link lost. Homeowner can check the internet and restart the router.
• OFF mode: the inverter was switched off. Check with Fused before switching it back on.
• Islanding (40, 2x28, 144, 2x90): the grid is down or unstable. Wait for the grid; the inverter restarts on its own.
• Grid or AC voltage too high or too low (31, 32, 33, 41, 2x1F, 2x20, 2x21, 2x29): technician.
• Isolation fault (25, 2x19) and DC isolation: technician.
• Ground current (10, 37, 38, 2xA, 2x25, 2x26): technician.
• Arc fault (147, 150, 151, 3x11, 2x96, 2x97): technician.
• Red light on the inverter / Production issue detected: check the weather. If it is sunny, technician.
• Battery temperature too high or too low: wait one hour. If it has not cleared, technician.
• Critical ambient temperature reached: make sure nothing blocks the equipment and air can move around it.
• System overload during an outage: reduce what is running on backup power. If it stays locked, technician.
• Home Battery not working in backup mode: technician.

Write down the exact code and the time you saw it, or take a screenshot of the app.

2. No Communication and an App That Shows No Data

"No communication with the site," "No communication with the inverter," and a mySolarEdge app with blank charts all point to the same thing: the inverter is not reaching SolarEdge over the internet.

This is the alert where a homeowner has the clearest steps:

Check that your internet works. Open a website on a phone or computer connected to the same home Wi-Fi network the solar system uses.
Check the router and modem. Make sure both are plugged in, powered on and connected.
Think about recent changes. A new router, a new internet provider, or a changed Wi-Fi password will break the link until the system is reconnected. Recheck after any of those changes.
Restart the router. Unplug your own Wi-Fi router, wait a moment, and plug it back in.

Then look at the light on the front of the inverter from where you stand, without opening anything. A blue light means the inverter is talking to SolarEdge. On older inverters with a screen, "S_OK" means the same thing.

If the data still does not show, book a technician.

💡 Pro Tip: If you recently switched internet providers or changed your Wi-Fi password, mention it when you call. It often explains a "No communication" alert right away.

3. OFF Mode: Why the Inverter Was Switched Off

When a SolarEdge inverter shows OFF mode, it means someone switched the inverter off. It did not shut down on its own. It might have been a family member, a roofer or a technician from an earlier visit.

The important part: do not switch the inverter back on yourself. Check with Fused before switching the inverter back on. There may be a good reason it was turned off, and turning it back on without knowing why could put people or equipment at risk.

Here is what to do instead. Ask around the household and think about who has been on the property recently. Then book a technician call so we can confirm why it was turned off and whether it is safe to turn back on. If someone in the home turned it off on purpose, tell us why.

Request a diagnostic visit at https://fusedsolarandroofing.com/solar-repair

4. Islanding Codes 40, 2x28, 144 and 2x90

Islanding sounds alarming, but it is the inverter doing its job. When the utility grid goes down or becomes unstable, the inverter stops sending power out to the grid by design. SolarEdge reports this with codes 40, 2x28, 144 and 2x90.

Tampa Bay homeowners tend to see this after summer thunderstorms and any time the utility has an outage or a flicker in the area. The steps for a homeowner are short:

Check whether the utility power is out. Look at your neighbors' lights, check your utility's outage map, or call the utility.
Wait for the grid to return. The inverter restarts on its own once the grid is back and stable.

If the islanding code keeps showing up after the grid is back and working normally, book a technician. Repeated islanding with a healthy grid points to something a technician needs to measure.

Closely related are the grid and AC voltage codes: 31, 32, 33, 41, 2x1F, 2x20, 2x21 and 2x29. These mean the inverter sees grid voltage that is too high or too low. They are marked for a technician, with no homeowner steps. If you see one of these codes, book a diagnostic visit.

🔑 Key Takeaway: Islanding during a power outage is the inverter responding to the grid as designed. Wait for the grid to come back. If the code repeats once the grid is steady, that is the time to call.

5. Isolation Fault 25, 2x19 and Ground Current Codes

An isolation fault means the inverter has detected that electricity may be leaking from the DC side of the system, the wiring between your solar panels and the inverter, toward ground. SolarEdge reports it as error code 25 or 2x19, and you may also see it called a DC isolation fault. The inverter stops producing to protect the system and the people around it.

Ground current codes 10, 37, 38, 2xA, 2x25 and 2x26 are in the same family. They mean the inverter has measured current flowing where it should not.

There are no homeowner steps for any of these codes. Finding the cause takes test equipment and a licensed technician.

What you can do is simple. Leave the equipment alone, note the code and time, take a screenshot of the app if you can, and book a diagnostic visit.

⚠️ Warning: An isolation fault or ground current code is a safety alert. Do not open the inverter, do not touch any wiring, and do not go on the roof to look at the panels. Book a technician and stay clear of the equipment until they arrive.

6. Arc Fault Codes 147, 150, 151, 3x11, 2x96 and 2x97

An arc fault means the inverter has detected an electrical arc, a spark jumping across a gap in the DC wiring. SolarEdge inverters watch for this and shut down production when they detect one, reporting codes 147, 150, 151, 3x11, 2x96 or 2x97.

Arc detection is a fire-safety feature. When it trips, the inverter is telling you something on the DC side needs a close, hands-on inspection. There are no homeowner steps for arc fault codes, including any kind of reset. A licensed technician needs to find the source before the system goes back into service.

If you see an arc fault code, leave the system as it is, keep people away from the equipment, and book a diagnostic visit. If you also notice smoke, a burning smell, sparks or heat anywhere near the equipment, stay away, call 911 if there is smoke or fire, then call for service.

⚠️ Warning: An arc fault code means the inverter detected sparking in the solar wiring. Do not try to clear the code or restart the system. Book a licensed technician to find the cause.

7. Red Light, Production Issue Detected, and Battery Alerts

Red light on the inverter or "Production issue detected." A red light on a SolarEdge inverter or a production issue alert in the app means the system is not producing the way it should. The safe homeowner step is to check the weather. Clouds and storms lower production. If it is sunny and the red light or alert is still there, book a technician.

Battery temperature too high or too low. If you have a SolarEdge Energy Bank or another battery on the Home Hub, this alert means the battery is outside its comfortable temperature range. Wait. If the alert has not cleared after one hour, book a technician.

Critical ambient temperature reached. This means the air around the equipment is too hot. Make sure nothing blocks the equipment and that air can move around it. Move anything stacked against or in front of the inverter or battery. Do not open or move the equipment itself.

System overload during an outage. When the grid is down and the battery is running the home, the house can ask for more power than the system can supply. Reduce what is running on backup power, such as the oven, dryer or pool pump. If the system stays locked after you cut back, book a technician.

Home Battery not working in backup mode. If the battery does not take over during an outage, there are no homeowner steps. Book a technician.

If your system has stopped working and you do not see a clear code, or you want a broader look at why a SolarEdge system goes down, our companion post at https://fusedsolarandroofing.com/post/solaredge-system-not-working-tampa covers that side of things.

8. Getting Help with a SolarEdge Code: Sunny and a Technician Visit

Codes tend to show up late at night, on a weekend or right after a storm. Fused's website has an AI assistant named Sunny who can help at any of those hours. Open fusedsolarandroofing.com and tap the chat bubble.

Sunny is Fused Solar and Roofing's AI assistant, available any hour on fusedsolarandroofing.com, and she can read a screenshot of your app or a photo of your equipment's display.

Here is how it works. Type the code you see, or send a photo of the inverter screen or a screenshot of the mySolarEdge app. Sunny explains what the code generally means and reminds you never to open any equipment. If the alert has a safe homeowner step, like restarting your Wi-Fi router or waiting for the grid to return, she walks you through it. If it does not, she collects your property address and the best day and time for a technician,

When a technician is needed, Fused's on-site diagnostic visit is $395 and includes a written report with photos. The technician tests the system and finds the cause of the code.

Fused services SolarEdge systems installed by other companies, including systems whose original installer is no longer in business. Any paperwork you have from the original install is useful to share.

Frequently Asked Questions

1. What does SolarEdge error code 25 mean?

Error code 25, also shown as 2x19 on some inverters, is an isolation fault. It means the inverter detected that electricity may be leaking from the DC wiring toward ground, so it stopped producing. There are no homeowner steps for this code. Leave the equipment alone and book a diagnostic visit with a licensed technician.

2. What does islanding mean on my SolarEdge inverter?

Islanding (codes 40, 2x28, 144 and 2x90) means the grid is down or unstable, so the inverter stopped sending power out to the grid. Check whether the utility power is out and wait for it to return. The inverter restarts on its own once the grid is stable. If the code keeps coming back after the grid is normal, book a technician.

3. Why does my SolarEdge app show no data?

No data in the mySolarEdge app usually means the inverter lost its internet connection. Check that your internet works, that the router and modem are powered and connected, and restart the router, especially after a router or password change. A blue light on the inverter (or "S_OK" on older screen models) means it is talking to SolarEdge. If data still does not show, book a technician.

4. What does arc fault code 150 mean on a SolarEdge inverter?

Code 150, along with 147, 151, 3x11, 2x96 and 2x97, means the inverter detected an electrical arc in the DC wiring and shut down as a fire-safety measure. There are no homeowner steps, and the code should not be cleared without finding the cause. Book a licensed technician. If you see smoke, sparks or a burning smell, stay away and call 911.

5. What does a red light on my SolarEdge inverter mean?

A red light, or a "Production issue detected" alert in the app, means the system is not producing as it should. Check the weather, since a heavy overcast day can lower production. If it is sunny and the red light is still on, book a technician to find the cause.

6. Can a different company service my SolarEdge system?

Yes. Fused Solar and Roofing services SolarEdge systems installed by other companies, including systems whose original installer is no longer in business. Our technicians handle SolarEdge inverters, the Home Hub and Energy Bank batteries across Hillsborough, Pinellas, Pasco and Manatee counties.

Request a diagnostic visit at https://fusedsolarandroofing.com/solar-repair

Fused Solar and Roofing is a licensed roofing (CCC1331058), electrical (EC13014750), and building contractor (CBC1252064), serving Hillsborough, Pinellas, Pasco, and Manatee counties since 2007, and services solar and battery systems of all brands, including systems whose original installer is no longer in business. Fused Solar and Roofing is an EnergySage Elite Installer with a 5.0/5 rating and 21+ verified reviews — independent verification, earned not purchased.

Book your SolarEdge diagnostic visit at https://fusedsolarandroofing.com/solar-repair