10 Common Solar Inverter Problems & How to Fix Them

Solar inverters are the heart of any solar power system, converting DC electricity from solar panels into usable AC power. However, like any electrical device, they can face technical issues that impact performance. If your solar inverter is not working, don’t worry. Many problems can be easily diagnosed and fixed.

In this guide, we’ll explore the 10 most common solar inverter problems, how to troubleshoot them, and when to call an expert. Plus, we’ll introduce Elios Solar Inverters, a reliable solution for long-term solar efficiency.

1# Solar Inverter Not Turning On

Possible Causes:

• No power supply or system shutdown
• Loose connections in the wiring
• Battery or grid failure (for hybrid or grid-tied systems)

How to Fix:

• Check if the power switch is on and the inverter is connected properly.
• Ensure the battery is charged (for off-grid or hybrid systems).
• Look for loose wires and reconnect them securely.
• If grid-connected, verify that your home’s power supply is working.

If the inverter still won’t start, reset it by turning it off for 5 minutes and restarting.

2# Solar Inverter Display Not Working

Possible Causes:

• Power failure
• Internal inverter malfunction
• LCD display damage

How to Fix:

• Ensure the inverter is receiving power from the solar panels or grid.
• Check for tripped circuit breakers or blown fuses.
• If the issue persists, the display may need to be replaced by a technician.

3# Solar Inverter Showing a Fault Code or Error Message

Possible Causes:

• System overload
• High or low voltage fluctuations
• Internal software issues

How to Fix:

• Refer to the solar inverter manual to decode the error message.
• If it’s a voltage issue, check if your grid voltage matches inverter requirements.
• Restart the inverter and see if the error clears.

Some premium inverters, like Elios Solar Inverters, come with smart diagnostic tools to simplify troubleshooting.

4# No Power Output from the Inverter

Possible Causes:

• Low solar energy input
• Faulty wiring or disconnected solar panels
• Internal inverter malfunction

How to Fix:

• Check if solar panels are producing energy using a multimeter.
• Inspect the wiring and connections between the inverter and panels.
• Reset the inverter and see if it starts producing power.

If the problem persists, contact your installer or manufacturer for support.

5# Overheating of the Solar Inverter

Possible Causes:

• Poor ventilation around the inverter
• Dust accumulation inside the unit
• High ambient temperatures

How to Fix:

• Ensure proper airflow around the inverter by keeping it in a well-ventilated area.
• Clean dust or debris around the cooling fan or heat sink.
• Move the inverter to a shaded area if it's exposed to direct sunlight.

Elios Solar Inverters feature advanced cooling systems to prevent overheating and improve efficiency.

6# Solar Inverter Making Unusual Noise

Possible Causes:

• Internal fan issues
• Electrical faults
• Loose components

How to Fix:

• Listen for grinding or buzzing noises; this could mean a failing fan.
• Check if any screws or internal components are loose.
• If the noise is excessive, contact a professional technician.

7# Solar Inverter Not Connecting to WiFi or Monitoring App

Possible Causes:

• Poor WiFi signal strength
• Incorrect network configuration
• Firmware issues

How to Fix:

• Ensure your WiFi router is within range of the inverter.
• Reset your inverter’s WiFi settings and reconnect.
• Update the inverter firmware through the manufacturer’s app.

Elios Solar Inverters come with seamless smart monitoring, allowing you to track performance remotely.

8# Inverter Shutting Down at Peak Sun Hours

Possible Causes:

• Grid overload or voltage fluctuations
• Thermal shutdown due to high temperature
• System overproduction

How to Fix:

• Check the grid voltage and adjust settings if needed.
• Improve cooling and ventilation to prevent overheating.
• If the issue continues, consult your solar provider for adjustments.

9# Battery Not Charging in Hybrid Solar Systems

Possible Causes:

• Dead battery or faulty battery connections
• Inverter settings not configured correctly
• Low solar panel output

How to Fix:

• Verify battery health and charge level.
• Ensure solar panels are generating enough power.
• Check inverter settings for proper battery charging mode.

10# Inverter Performance Decreasing Over Time

Possible Causes:

• Aging system components
• Poor maintenance
• Degrading solar panels

How to Fix:

• Clean solar panels regularly to maintain efficiency.
• Update inverter firmware and software if available.
• Consider upgrading to a modern, efficient solar inverter.

Important Disclaimer: Consult a Professional for Solar Inverter Issues

The troubleshooting steps provided in this guide are general recommendations based on common solar inverter issues. While some minor problems can be resolved by following these suggestions, solar power systems involve complex electrical components that require professional expertise for proper diagnosis and repair.

If your solar inverter is not working correctly, we strongly advise you to contact a certified solar technician or your inverter manufacturer’s support team to prevent further damage and ensure safety.

Always prioritize safety and consult professionals for any technical issues beyond basic troubleshooting.

Why Choose Elios Solar Inverters for Reliable Performance?

If you’re experiencing frequent solar inverter issues, it might be time for an upgrade. Elios Solar Inverters are designed for high efficiency, durability, and seamless troubleshooting, offering:

• Smart self-diagnosis to detect and fix common errors
• Advanced cooling systems to prevent overheating
• Seamless integration with monitoring apps for real-time tracking
• Optimized performance for residential and commercial solar systems

Final Thoughts

Solar inverters are essential for a functioning solar power system, but they can encounter common problems over time. By following this troubleshooting guide, you can quickly diagnose and resolve issues without expensive repairs.

For long-term reliability and maximum energy savings, consider investing in a high-quality solar inverter like Elios Solar Inverters.