Solar Panels Not Working? Common Causes & What to Do
If your solar panels have stopped working or your system is not generating any electricity, it’s more than just frustrating, it’s costly every day the issue goes unresolved.
While residential solar panel systems are designed to be reliable and low maintenance, they rely on several electrical components working together. When one fails, your entire system can stop producing power.
This solar panel troubleshooting guide focuses specifically on situations where solar panels aren’t working at all or are showing zero output. We’ll explain the most common causes, what you can safely check yourself, and when it’s time to call a professional.
Important: If your system is still producing some electricity but less than expected, that’s a different issue. Learn more about it here.
First: Are Your Solar Panels Actually Not Working?
Homeowners often describe several different issues as “not working.” If your system is still producing some power, even intermittently, this guide may not be the best fit. In this article, we’re talking about:
- Solar monitoring showing zero production
- An inverter that appears offline or displays an error
- A sudden return to full utility bills after having solar
Solar Panel Troubleshooting Checklist for Zero Production
If your solar panels have stopped generating electricity, these are the most common causes we see in Arizona homes.
1. Inverter Malfunction or Failure
The inverter is the heart of your solar system. It converts the electricity your panels produce into usable power for your home. If the inverter isn’t working, your solar panels won’t generate usable electricity, no matter how sunny it is.
What to look for:
- Error messages or warning lights on the inverter
- A blank or dark inverter display
- Monitoring alerts showing the system is offline
Inverters work harder than any other system component and typically carry 10–15 year warranties, compared to 25+ years for panels. Failures or protective shutdowns are common causes of total power loss.
If your inverter appears to be offline or faulty, professional service is required.
2. Utility or Grid Disconnection
Sometimes your solar panels are fine, but the utility has disconnected the system.
Common causes include:
- Utility maintenance or grid work
- Interconnection or net billing issues
- Safety-related shutdowns
In Arizona, APS or SRP utility actions can temporarily stop solar systems from producing or exporting power.
A licensed solar professional can quickly confirm whether the issue is utility-related or equipment-related.
3. Tripped Breakers or Safety Shutoffs
Modern solar systems include multiple safety devices designed to shut the system down if something isn’t right.
What you can safely check:
- Breakers labeled “solar” in your main electrical panel
- AC disconnects near the inverter
If breakers repeatedly trip or won’t reset, do not do anything to force them, this usually indicates a deeper electrical issue.
4. Faulty Wiring or Electrical Connections
Loose, corroded, or damaged wiring can cause partial or total system shutdowns. Damage may occur from age, pests, moisture intrusion, or previous electrical work.
While you may be able to visually inspect exposed conduits, electrical repairs should always be handled by a licensed professional. Wiring issues can be dangerous and are rarely DIY fixes.
5. Monitoring or Communication Issues
In some cases, your system is producing power, but the monitoring system or sensor isn’t reporting correctly.
Common causes include:
- Wi-Fi or router changes
- Loss of internet connection
- Failed monitoring and sensor hardware
A flat production graph doesn’t always mean zero production, but it does need verification.
What Usually Doesn’t Cause Solar Panels to Stop Working
These issues may reduce output, but they rarely cause complete power loss:
- Dirty or dusty panels
- Seasonal weather changes
- Partial shade
- Normal panel aging
If your system shows zero production, the issue is almost always electrical, inverter-related, or utility-side.
When to Call a Solar Professional
You should schedule service if:
- Your inverter shows an error or won’t turn on
- Your system has produced zero power for more than 24 hours
- Breakers repeatedly trip
- Monitoring data is missing or inconsistent
- You suspect wiring or electrical damage
Every day your solar system isn’t working is sunlight and energy savings you can’t get back.
Why Arizona Homeowners Trust SouthFace Solar & Electric
SouthFace Solar & Electric has been serving Arizona homeowners since 2008. As a locally owned solar company with decades of combined experience, we provide:
- Expert solar panel troubleshooting
- Inverter repair and replacement
- Electrical diagnostics and safety inspections
- Service for systems we didn’t originally install
We believe solar ownership doesn’t end at installation. When your system stops working, you deserve fast, honest answers from local experts who stand behind their work.
FAQs: Solar Panels Not Working
Why did my solar panels suddenly stop working?
The most common causes are inverter failure, utility disconnection, or a safety shutdown. These issues typically require professional diagnosis.
Can solar panels stop working even if they look fine?
Yes. Panels may appear normal while electrical components like inverters, wiring, or safety devices have failed.
Will dirty panels cause my system to produce zero power?
No. Dirt can reduce output but almost never causes complete shutdown.
Should I try to fix my solar system myself?
You can check breakers and monitoring connections, but electrical repairs should always be handled by licensed solar professionals.
Schedule Solar Panel Troubleshooting & Repair in Arizona
If your solar panels aren’t working or generating electricity, SouthFace Solar & Electric can identify the issue and get your system back online.
