What Does It Mean When My Generator Displays an Error Code: Low Battery, Code 2750?

Ensure proper battery function, compare the DC voltage readings on the battery and the generator's controller and recharge the battery if the voltage is below 12.5 VDC or check the battery charger if the voltage is over 12.5 VDC, and contact a Generac Authorized Service Dealer for assistance.

  • Feb 26, 2026
  • Knowledge

Title
What Does It Mean When My Generator Displays an Error Code: Low Battery, Code 2750?
URL Name
What-Does-It-Mean-When-My-Generator-Displays-an-Error-Code-Low-Battery-Code-2750

Public Answer

Read the manual thoroughly and understand all of the instructions, cautions, and warnings before using this equipment. If any section of the manual is not understood, contact your nearest authorized dealer, or contact Generac Customer Service at 1-888-436-3722 (1-888-GENERAC), or www.generac.com with any questions or concerns. 

 

LOW BATTERY: Error Code 2750

 

Environment

This article applies to error code 2750, LOW BATTERY, for Generac air-cooled home standby generators.

Note: The term "error code" is used interchangeably with 'alarm code,' 'fault code,' 'fault alarm' and similar terminology. Error code applies to all such terminology. 

 

Overview

Error code: 2750

Alarm: LOW BATTERY

Issue: Low battery 

General troubleshooting

If you are experiencing issues with your battery charger on a new install, it may be due to a missing neutral wire for the battery charger circuit.  If this neutral is not installed it will prevent the battery from charging and will show battery charger warnings on the control panel. For more information, see: My Generator was just installed and is giving a "Charger Warning" or "Charger Missing AC Warning"

To make sure that the battery in your generator works correctly, it should be checked for its voltage. This is done by comparing the DC voltage readings on the battery and the generator's controller. If the battery doesn't measure as having at least 12.5 VDC, Give the battery 24 hours to charge. 

  • If charging for 24 hours does not resolve the issue, then the battery may require replacement.
  • If the voltage is over 12.5 VDC, check the battery charger for proper operation. 


Additionally, performing a hard reset may clear this error. See How Do I Perform a Hard Reset on a Home Standby System? for more information.
If this error code persists, a service visit from a local dealer may be required. See How Can I Find a Generac Service Dealer in My Area? for more information.
For a complete list of home standby generator error codes, see the Where can I find a list of error codes for my generator? article.

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