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Can I take out the generator's main breaker and replace it with a larger breaker?

The breaker that is pre-installed on a generator is sized for the unit's output capabilities. Replacing a breaker with a larger breaker will not yield any more output of the unit, and would allow the unit to be easily overloaded. This modification would also void the unit's warranty.

Dec 4, 2025
Knowledge

Title

Can I take out the generator's main breaker and replace it with a larger breaker?

URL Name

Can-I-take-out-the-generator-s-main-breaker-and-replace-it-with-a-larger-breaker

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.

Can I take out the generator's main breaker and replace it with a larger breaker?

The Main Line Circuit Breaker is carefully matched to the generator’s output. Replacing it with a larger breaker is dangerous and can cause electrical damage, fire, or injury. It will not increase the generator’s output and will compromise the warranty.

Environment

This article applies to air-cooled and liquid-cooled standby generators.

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Can I take out the generator's main breaker and replace it with a larger breaker?