Solar Panels Stopped Working? Emergency Troubleshooting Guide

Your monitoring app shows zero production on a clear sunny day. Your system has completely stopped working. This is stressful, but take a breath — most of the time, it's something simple that you can fix in 5 minutes. Let's diagnose it.

Step 1: Check Your Breakers (2 minutes)

The most common cause of zero production is a tripped circuit breaker. Your solar system has multiple breakers:

• DC breaker — between panels and inverter (usually mounted on or near the inverter)
• AC breaker — between inverter and electrical panel (usually in your main panel)
• Main panel breaker — master disconnect for your whole home

Walk around your home and check that ALL solar-related breakers are in the ON position. Look for any that are switched to OFF or are in a middle position (tripped).

If you find a tripped breaker: Switch it fully OFF, then back to ON. If it immediately trips again, there's an electrical fault and you need a technician. If it stays ON, your system should start producing again within 5 minutes.

If all breakers are ON: Move to the next step.

Step 2: Check Your Inverter Lights (1 minute)

Walk to your inverter (usually mounted on your garage wall or in a utility room). Look at the status lights:

What you should see on a sunny day: A green "Operating" or "Producing" light. You may also see a blue wireless connection indicator.

What's concerning:

• All lights are OFF — inverter has no power
• Red or yellow error light — fault condition
• Orange light blinking — inverter in fault recovery mode

If the inverter has no power: Check the breaker again (it may have just tripped). If breaker is ON and inverter still has no power, there's an electrical issue. Call a technician.

If there's a red/yellow error light: Note the error code. Check your monitoring app — it will show the same error code. Move to step 3.

Step 3: Check Your Monitoring App (1 minute)

Open your SolarEdge or Enphase app:

• Inverter status — should show "Producing" or "Operating" on a sunny day. If it shows "Offline," the app can't communicate with your inverter. Try closing and reopening the app.
• Error codes — look for any red alerts. Common critical codes: "Grid disconnected," "Isolation Fault," "Arc Detection," "DC Voltage High"
• Power production graph — should be climbing as the sun rises. If it's flat at zero, your system isn't producing.

Is your app showing "Offline" even though the inverter lights are on? You may have a WiFi or communication issue. Try these fixes:

1. Restart your WiFi router
2. Restart your inverter by turning its breaker OFF for 10 seconds, then back ON
3. Check that the inverter is connected to your WiFi (some inverters have a WiFi connection button)

Step 4: Understand Critical Error Codes

Grid Disconnect (if your system is NOT producing): Your inverter has detected a grid outage and shut down for safety. Your solar system CANNOT produce electricity when the grid is down (anti-islanding protection). Check if your neighborhood has lost power. If you want to produce during outages, you need a battery backup system.

Isolation Fault: Electrical current is leaking to ground. This is a safety issue that requires professional diagnosis. DO NOT keep trying to restart your system. Call an electrician.

Arc Fault Detection: Your system detected dangerous electrical arcing (potential fire hazard). STOP operation immediately and call a technician. This is a serious safety issue.

DC Overvoltage or DC Undervoltage: Your system may reset itself. If the error persists, there's a wiring or panel issue. Call a technician for diagnosis.

Step 5: When to Call a Professional

You can stop troubleshooting and call immediately if:

• Isolation fault or Arc fault error — safety hazard
• Multiple breakers are tripping repeatedly — electrical fault
• Inverter has no power and breaker is ON — power supply issue
• You see visible damage to panels, wiring, or mounting hardware — physical damage
• An error code won't clear after restart — likely hardware failure

Who to Call

If you have a warranty: Call your original installer first. They should honor warranty repairs at no cost during the warranty period.

If your installer is out of business: Call a local solar maintenance company. Look for companies that service systems they didn't install — they're experienced with diagnostics.

For simple electrical issues: A licensed electrician can reset breakers and test circuits. For solar-specific diagnostics, insist on a solar-trained technician.

Typical diagnostic visits cost $300-500 but save you from guessing. Don't put off professional help if you can't fix it in 5 minutes — every day of zero production costs you money.

How to Prevent This in the Future

The best way to catch system failures early is continuous monitoring. Most homeowners don't check their monitoring app daily, so they don't notice failures until production has been zero for a week.

SolarDoctor automatically alerts you the moment your production drops unexpectedly. Instead of waiting days to notice a problem, you get an alert within hours — fast enough to call a technician same-day and minimize downtime.