Solar inverters are an important part of your solar power system. They turn the energy from your solar panels into electricity you can use at home. Sometimes, inverters stop working properly. When that happens, resetting the inverter can fix the problem.

In this guide, we will explain how to reset a solar inverter in a safe and simple way. We will also share tips to avoid common mistakes.

What Is a Solar Inverter?

A solar inverter changes the power from your solar panels into electricity. Your panels collect energy from the sun, but that energy is direct current (DC). Most homes use alternating current (AC). The inverter makes this switch so your lights, fridge, and appliances can work.

If your inverter stops working, your system can’t send power to your home. That’s why it’s important to know how to reset it.

Why Do You Need to Reset a Solar Inverter?

Inverters are like small computers. Sometimes, they get stuck. A reset clears errors and helps the inverter start fresh.

Reasons to reset:

• The inverter is not producing power.
• A red or orange light is showing.
• You see an error message.
• The monitoring app shows zero or low output.

A reset often fixes small problems. But if the issue happens again and again, you should call a solar expert.

Safety First: What You Need to Know Before Resetting

Before you reset your inverter, follow these safety tips:

• Turn off the solar supply using the switches provided.
• Wear rubber-soled shoes if standing outside.
• Never touch live wires or damaged equipment.
• If unsure, call a professional.

Always follow the manual from the company that made your inverter.

Types of Solar Inverters

There are different types of solar inverters. The way you reset them is usually similar, but it’s good to know the type you have:

1. String Inverter: Common in homes. Connects many solar panels in a row.
2. Microinverter: One for each panel. Usually installed under panels.
3. Hybrid Inverter: Works with solar and battery systems.
4. Central Inverter: Large systems like schools or businesses.

Most home systems use string inverters.

Step-by-Step: How to Reset a Solar Inverter Safely

Follow these steps to safely reset your solar inverter. This process is often called a “shutdown and restart.”

Step 1: Turn Off the Solar Supply Main Switch

• Go to your switchboard or inverter panel.
• Find the switch labeled “Solar Supply Main Switch.”
• Turn it off.

Step 2: Turn Off the Inverter AC Isolator

• This switch is usually near your inverter.
• Turn it to the “OFF” position.

Step 3: Turn Off the Inverter DC Isolator

• This switch is near the solar panels or on the inverter.
• It may be labeled “PV Array DC Isolator.”
• Turn it off.

Now your inverter is completely off. Wait for 1 to 2 minutes.

Step 4: Turn Everything Back On (In Reverse Order)

• Turn ON the DC Isolator.
• Turn ON the AC Isolator.
• Turn ON the Solar Supply Main Switch.

The inverter will restart. This can take a few minutes. You may see lights flashing or hear a small sound. That’s normal.

After the Reset: What to Check

Once the inverter is back on:

• Check for green lights. That means it’s working.
• Check your monitoring app.
• Watch for any error messages.

If everything looks fine, your system is working again.

What If the Reset Didn’t Work?

If the inverter still shows errors or isn’t producing power:

• Check if the solar panels are dirty or shaded.
• Check if breakers or fuses have tripped.
• Make sure there’s no damage to wires.

Still having trouble? Contact a licensed solar technician.

How Often Should You Reset an Inverter?

You shouldn’t need to reset your inverter often. Once or twice a year is normal. If you’re resetting it every week, something might be wrong.

Possible issues:

• Old inverter (over 10 years)
• Loose wiring
• Poor installation
• Grid issues

In such cases, it’s best to get a full inspection.

Tips to Avoid Inverter Problems

Here are some simple tips to avoid future issues:

• Keep your inverter clean and dry.
• Don’t block airflow around the inverter.
• Check for insects or small animals inside the box.
• Don’t overload the system with too many panels.

Have your system checked once a year by a professional.

Common Mistakes to Avoid When Resetting

1. Not Turning Off All Switches

• Skipping a switch may cause a failed reset.

2. Resetting Too Quickly

• Always wait 1–2 minutes before restarting.

3. Ignoring Error Codes

• Check your manual for what error lights mean.

4. Forcing Switches

• If a switch is stuck, don’t force it. It may break.

5. Resetting During Storms or Rain

• Only reset when it’s dry and safe.

Tools That May Help You

• Flashlight (for dark areas)
• Camera (to take photos of error codes)
• Gloves (for safety)
• User manual

Different Brands, Different Reset Styles

Some inverter brands have small changes in how they work:

• Fronius: May need a reset button.
• SMA: Has LED lights that show errors.
• Growatt: Offers app support.
• Solax, ABB, Sungrow, Huawei: Follow brand instructions.

Always read the manual that came with your inverter.

Conclusion

Resetting a solar inverter is simple if you follow the right steps. It’s a safe way to fix small problems and get your system running again. But if errors continue, always ask a trained solar technician.

If you need help resetting your inverter or checking your solar system, our team at SolarX Cleaning and Maintenance Company is here to help. We provide expert support for homes and businesses in Ireland, including areas like Galway, Dublin, Cork, and Limerick.

Contact SolarX today for professional solar maintenance you can trust.