Home Battery Guide LiFePO4 Batteries Lithium Batteries Lithium Battery Troubleshoot Batteries Inverter is Not Charging the Battery Due to Low Voltage and Beeping Alarm - What Does It Mean?

By Sona Brands

On November 23, 2024

22,789,899 Views

We Are Sona Solar Zimbabwe – The Best Solar Systems Company and
Your Trusted Source for High-Quality, Affordable Solar Solutions.

Need expert Guidance to choose the Perfect Solar System or Solar-Powered Boreholes in Zimbabwe? Chat with our friendly Sona Solar Zimbabwe team on WhatsApp for fast, personalized advice. We typically respond within 30 minutes and Guarantee a reply within one hour.

Why is My Inverter Beeping? Low Battery Voltage & Charging Fixes

Published: Sona Solar Zimbabwe | Topic: Inverter Alarms

If your solar inverter is beeping due to low battery power, it's likely that the battery has reached a critical discharge level. This often manifests as Error 04 or Error 63, indicating the Battery Management System (BMS) has triggered protection mode.

Inverter is Not Charging the Battery Due to Low Voltage and Beeping Alarm

While alarming, this is usually a safety feature, not a failure. Understanding the root cause can quickly restore your system.

Decoding the Beeps

Error 04: Low Battery Voltage

This is the most common code on Must, Growatt, and Phocos inverters. It means the battery voltage is too low to sustain the inverter's operation. The beeping is a warning to reduce load before shutdown.

Error 63/64: BMS Protection

This indicates a specific issue with Lithium batteries. The internal BMS has detected a deep discharge and has cut off the output to protect the cells.

Why Is My Inverter Not Charging?

One of the most frustrating issues is when the grid/solar is available, but the inverter refuses to charge a flat battery.

BMS Protection Mode

The Cause: Lithium batteries have a computer (BMS) that shuts them down if voltage drops too low. When in this "sleep" mode, the battery shows 0V at the terminals.

The Problem: Most inverters need to detect some voltage (e.g., 40V+) to recognize a battery is connected. If the BMS is asleep (0V), the inverter thinks there is no battery and refuses to send charge.

Insufficient Solar

During cloudy days in Zimbabwe, panels may not generate enough voltage to wake up the inverter and charge the battery simultaneously.

The Solution: "Jump Starting" the BMS

How to Wake Up a Lithium Battery

External Voltage: You may need to apply a voltage from another source (like a second battery or a specialized charger) to the terminals for a few seconds.
The Wake-Up: This external voltage tricks the BMS into waking up. Once it wakes, the inverter will detect the voltage and begin normal charging.
Note: This should be done by a professional to avoid sparks or short circuits.

Expert Insight: John Moyo

"Regular maintenance prevents low voltage issues. Ensure your system settings (Cut-Off Voltage) are correct for your specific battery model to prevent it from entering deep sleep in the first place."

Need Professional Help?

Dealing with a beeping inverter or a sleeping lithium battery can be tricky. At Sona Solar Zimbabwe, we are committed to providing you with the best solutions and support.

Chat with Support

Join the Conversation

Have you experienced issues with your inverter not charging? Share your experiences in the comments below!

Battery Guide LiFePO4 Batteries Lithium Batteries Lithium Battery Troubleshoot Batteries

Pricing AND Availability Notice

Flexible Pricing:

Our Solar System Prices are regularly updated to reflect the best possible value amid fluctuating import costs and exchange rates. Contact us today for our latest discounted rates!

High Demand Alert:

Due to Zimbabwe's rapid Solar adoption, Our Systems sell quickly. To avoid Disappointment:

+263 78 864 2436

real-time stock verification.

WhatsApp message to the Sales Team.

priority Installation

Limited Stocks Available - Secure yours before the next price review!

Check Prices Stock

Sona Solar Zimbabwe – Your Trusted Partner for Solar Energy Solutions

Sona Solar Zimbabwe provides premium Solar Panels, Lithium Batteries, Inverters, and complete Solar Systems for homes, businesses, and industries. We also specialize in expert Borehole Drilling Solutions and Solar-Powered Water Systems. Trust our experienced team for professional Solar installations in Harare, Marondera, Mutare, Chitungwiza, and across Zimbabwe, delivering reliable, efficient, and cost-effective renewable energy solutions.