Quick Answer
Okay, so here's the quick version. If your solar panels aren't putting out what they should, it's often something simple: they're dirty, or a new tree branch is casting a shadow. It could also be a tripped circuit breaker. Check your monitoring app, visually inspect the panels, and then your breaker box. A more serious issue, and generally more involved to fix, is a failing inverter. A good hosing down of your panels is free. If you need a professional to replace an inverter, you're typically looking at anywhere from $1,500 to $4,000, depending on the type and complexity of the unit.
Common Symptoms
Possible Causes
Step-by-Step Diagnosis
Step 1
Check your solar monitoring app for historical and current data. Look for trends and anomalies compared to previous weeks or months.
Step 2
Visually inspect the panels from the ground for any obvious dirt, debris, or new shading obstructions.
Step 3
Examine the inverter for any error codes, warning lights, or unusual noises. Write down any codes you see.
Step 4
Verify that all breakers in your main panel and any solar-specific sub-panels are in the 'ON' position.
Step 5
If breakers are on but an error exists, perform a system reset by following the manufacturer's specific shutdown and startup procedure.
DIY vs Professional Costs
| Repair Type | DIY Cost | Professional Cost | Time Required |
|---|---|---|---|
Panel Cleaning | $0 - $30 | $150 - $400 | 1-3 hours |
Inverter Replacement | N/A | $1,500 - $4,000 | 2-4 hours |
Electrical / Wiring Repair | N/A | $250 - $800 | 2-5 hours |
Single Panel Replacement | N/A | $300 - $1,000 | 1-2 hours |
When to Call a Professional Solar
- If an inverter displays 'Ground Fault' or 'Arc Fault' error codes, as these are serious safety issues.
- If a breaker related to the solar system trips immediately after you try to reset it.
- If production is still significantly low after you've cleaned the panels and successfully reset the system.
- If you see any visible damage like cracked panels, scorched wires, or melted components.
- Anytime a repair requires getting on a steep, high, or otherwise unsafe roof for someone without safety training and equipment.
Prevention Tips
- Monitor your system's performance weekly using the provided app to catch issues early.
- Rinse your panels with a hose periodically, especially after dusty or high-pollen seasons. Avoid pressure washers.
- Routinely trim trees and vegetation that could grow to shade your panels.
- Install 'critter guards'—a wire mesh around the array's perimeter—to prevent pests from nesting and chewing wires.
- Schedule a professional inspection every 1-2 years to have wiring, connections, and mounting hardware checked.
Frequently Asked Questions
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