6 Most Common Solar Inverter Errors Easy Fixes

Oct 17, 2025

DIY Guide: Checking Your Solar Inverter for Common Errors

Your solar inverter is the brain and heart of your solar power system. It converts direct current (DC) from your solar panels into alternating current (AC) for your home or farm. When something goes wrong, your system’s performance can drop even if sunlight is strong.

This DIY guide will help you identify and fix common Solar Inverter Errors, understand what warning signals mean, and know when to call for professional help from Deep Tec‘s expert team.

⚡

Table of Contents

System Brain

Converts DC to AC power

1. Begin with a Visual Inspection

Before diving into error codes, start with a quick visual check. Many Solar Inverter Errors can be prevented by spotting early warning signs:

Check for indicator lights or messages on the inverter screen.
Look for physical damage such as burn marks or cracks.
Ensure ventilation Poor airflow causes overheating a common reason behind inverter shutdowns.
Inspect both AC and DC isolators for moisture or rust.
Clean surroundings regularly to avoid dust, insects, or debris entering the unit.

💡 Safety Tip:

Always switch off the inverter completely before touching cables or panels.

Learn more about how solar inverters convert DC to AC power in this Energy.gov guide on solar inverters.

2. Understand the Meaning of Lights and Codes

Inverters communicate through simple light signals a major clue to detect Solar Inverter Errors quickly.

Light / Display	Meaning	Action
Green (steady)	System working normally	No action needed
Green (flashing)	Power generating	Normal
Red or “FAULT”	System error	Check for Solar Inverter Errors
Yellow/Orange	Warning or standby	Check sunlight or grid
No light	No power supply	Inspect fuse or circuit breaker

If you own a Deep Tec inverter, look for the exact error code shown on the display or app. These Solar Inverter Errors are coded—to tell you what part of the system is affected—DC input, AC output, or internal electronics.

3. Common Solar Inverter Errors and How to Fix Them

Let’s explore the most frequent Solar Inverter Errors faced by users in Sri Lanka and the safe ways to troubleshoot them.

a. No Power Output

Check if the DC isolator is ON.
Confirm solar panel cables are connected properly.
Inspect fuses and circuit breakers.

b. “No Grid” or “Grid Fault”

Usually appears when the inverter can’t detect the national grid.
Check for power cuts or loose AC wiring.
Reset after a few minutes once power stabilizes.

c. Over-Voltage / Under Voltage

These Solar Inverter Errors occur when grid voltage fluctuates.
The inverter automatically shuts down to protect itself.
Wait until voltage normalizes—it will restart automatically.

d. Isolation or Ground Fault

Caused by moisture or damaged wiring.
Inspect junction boxes for water leaks or corrosion.
If the fault repeats, contact Deep Tec’s service team immediately.

4. Use the Monitoring App

Modern Deep Tec systems allow you to detect Solar Inverter Errors remotely via the Wi-Fi or Bluetooth app. You can:

Track real-time energy generation.
Monitor inverter temperature and status.
Receive automatic alerts when Solar Inverter Errors occur.

This helps you act fast and reduce downtime.

📱

Remote Monitoring

Real time alerts and tracking

5. When to Call a Professional

If your inverter repeatedly shows the same Solar Inverter Errors, or emits an unusual smell or noise, it’s time to call for expert service. Avoid DIY electrical repairs it can be risky.

Deep Tec’s certified technicians specialize in diagnosing inverter faults and ensuring your system operates safely and efficiently.

6. Maintenance Tips for Long Life

To minimize Solar Inverter Errors and extend system life:

🌡️

Keep Cool

Keep the inverter shaded and dust free

🧹

Clean Regularly

Wipe surfaces with a dry cloth

🚫

Safe Space

Avoid storing tools or chemicals nearby

📅

Professional Check

Schedule maintenance twice a year

Related Deep Tec Blogs

Solar Energy in Sri Lanka

How Solar Energy Helps Sri Lanka Achieve Its Renewable Energy Targets

Solar Net Metering

From Roof to Revenue: How Solar Net Metering Can Earn You Money

By learning how to detect Solar Inverter Errors, you can keep your system running efficiently and avoid power losses. With Deep Tec’s reliable monitoring tools and service team, managing your inverter is simple and stress-free.

If you notice recurring Solar Inverter Errors, contact the Deep Tec Support Team your trusted partner for clean, smart energy solutions in Sri Lanka.