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.

Battery troubleshooting and maintenance guide for home standby generators

This guide serves as a central resource for addressing common battery-related issues and maintenance.

Environment

• Generac Next Generation Series 10-28 kW air-cooled standby generators
• Generac Guardian Series 10-26 kW air-cooled standby generators (2017 to present)

Battery basics

Proper battery maintenance is critical to ensure reliable generator performance. Common issues, such as a swollen case, low voltage, and slow cranking, may require replacement or cleaning. Essential safety guidelines for working with batteries and necessary tools for battery checks and maintenance are required. It is also important to understand the charger system and its role in generator operation. See the following links for detailed information related to battery basics:

• Introduction to generator battery
• Safety precautions and required tools for home standby battery maintenance, replacement, and testing
• Understanding the home standby generator’s charging system

Battery maintenance and replacement

To check the battery voltage of a home standby generator, access the maintenance menu and interpret the system status to determine necessary actions. For routine maintenance, inspect and clean battery connections while also addressing corrosion. Follow guidelines for choosing and replacing the battery, including proper disposal. A voltage test with a voltmeter can be performed to assess battery health. See the following articles for detailed procedures and in-depth information:

• How to view your home standby generator’s battery voltage
• Routine battery maintenance for home standby generators
• Selecting and replacing a battery for a home standby generator
• How to perform a battery voltage test on a home standby generator with a multimeter

Battery troubleshooting

For an explanation of common battery alarms and their meanings and guidance on immediate actions to take when an alarm is triggered, see:

• Troubleshooting home standby battery alarms and error codes

For techniques to determine whether starting issues stem from the battery or the charger, and common battery issues and how to address them, see:

• Diagnosing starting issues: battery or charger