AC Breaker Trips: Steps to Diagnose and Resolve Issues

Modified on Tue, 4 Feb at 2:08 PM

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Solis Inverter AC Trip Issue – Troubleshooting Guide

An AC Trip occurs when the AC circuit breaker trips, cutting off the connection between the inverter and the grid. This guide outlines the steps to diagnose and resolve AC trip issues effectively.

1. Gather Essential Information

Before troubleshooting, collect the following details:

Inverter Model & Serial Number
Error Code (if any)
Frequency of the Issue (occasional, daily, or continuous)
Software Version
Installation & Commissioning Date
Grid Standard Compliance
AC Circuit Breaker Type and Parameters

2. AC Trip During Initial Installation & Commissioning

If the issue occurs immediately after installation, follow these steps:

2.1 Use the Correct AC Circuit Breaker

Avoid breakers with built-in current protection.
Ensure the breaker’s rating is 1.2 times the maximum AC output current.

2.2 Verify Current Load

Confirm that the total current flowing through the breaker does not exceed its rated capacity.

2.3 Replace the AC Circuit Breaker

If the breaker continues to trip, replace it with a new one of the correct rating.

2.4 Identify When the Trip Occurs

Does it happen when connecting to the grid, during startup, or while generating power? This can help narrow down the cause.

3. AC Trip After Normal Operation for Some Time

If the inverter has been working normally but later starts experiencing AC trips, consider these steps:

3.1 Identify the Time & Conditions

Does the AC trip occur randomly, at a specific time, or under specific conditions?

3.2 Inspect AC Wiring Connections

Pay special attention to the AC circuit breaker terminals and ensure all wiring is properly secured and free from damage.

3.3 Replace the AC Circuit Breaker

A faulty breaker can degrade over time. Replace it with a new one to rule out hardware issues.

3.4 Test with a Different Inverter

If the issue persists, consider replacing the inverter to determine if it is causing the problem.

4. Contact Solis Support

If the issue remains unresolved, contact Solis technical support for assistance. Provide pictures of the device that is tripping (e.g., AC circuit breaker, RCD, or RCBO).