When solar panels stop producing power or show a sudden output drop, the cause is usually one of a handful of common issues — and most can be diagnosed with your monitoring app before calling a technician. Inverter faults, shading, soiling, and wiring issues account for the vast majority of solar production problems.
Common Causes and Diagnosis
| Cause | Symptom | First Step |
|---|---|---|
| Inverter fault | Zero or reduced output, error code on inverter display | Check inverter display/app for error codes |
| Shading | Output drops at specific times of day | Check for new obstructions (tree growth, construction) |
| Soiling | Gradual output decline over weeks/months | Visually inspect panels for dirt/debris |
| Wiring/connection issue | Intermittent or partial output loss | Professional inspection needed |
| Monitoring/communication fault | App shows no data, but system may still be producing | Check WiFi/network connection to monitoring device |
Step 1: Check Your Monitoring App
Most modern systems (Enphase Enlighten, SolarEdge, SMA Sunny Portal) show error codes or fault indicators directly in the app — this is the fastest way to identify whether the issue is inverter-related, a specific panel, or a monitoring/communication problem rather than an actual production loss.
Step 2: Visual Inspection
Check for obvious causes: new shading from tree growth, visible dirt or debris accumulation, or any physical damage to panels or wiring that might be visible from the ground — many issues have a visible cause that’s easy to identify once you know to look.
Step 3: Check for Recent Weather Events
Storms, high winds, or hail can occasionally cause damage or dislodge connections — if a production drop coincides with a recent severe weather event, this is a strong candidate for the cause and warrants professional inspection.
Step 4: Contact Your Installer or Monitoring Support
If the monitoring app shows a specific error code, or the issue isn’t resolved by basic checks, contact your installer or the equipment manufacturer’s support line — most issues beyond simple cleaning or obvious shading require professional diagnosis and repair.
When to Call a Professional Immediately
Any sign of physical damage, burning smell, visible sparking, or a complete system shutdown warrants immediate professional attention rather than DIY troubleshooting, for safety reasons.
Experiencing issues with your solar system? Get expert help: (855) 427-0058
Frequently Asked Questions
Why have my solar panels stopped working?
Common causes include inverter faults, shading, soiling, wiring issues, or a monitoring communication problem.
How do I diagnose a solar panel issue?
Start with your monitoring app for error codes, then check for visible shading, dirt, or damage.
Can dirty panels cause a big drop in output?
Yes, especially gradual decline over weeks or months without cleaning.
Should I call a professional if my system shows an error code?
Yes — most issues beyond simple cleaning or shading require professional diagnosis.
What should I do if I smell burning near my solar equipment?
Contact a professional immediately for safety reasons — do not attempt DIY troubleshooting.
Can storms damage my solar system?
Yes — high winds or hail can occasionally cause damage or dislodge connections.
Does a blank monitoring app mean my system isn’t producing power?
Not necessarily — it could be a WiFi or communication issue rather than an actual production loss.
Summing Up
Most solar production issues can be quickly diagnosed through monitoring data and visual inspection. For expert troubleshooting and repair, call (855) 427-0058 or visit us.solarpanelsnetwork.com.
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