What Do I Do if I Get an Invalid MAC Address Error When Attempting to Activate a Generator?

In this article, we will discuss the process of what to do when you encounter an Invalid MAC address error.

  • Dec 5, 2025
  • Knowledge

Title
What Do I Do if I Get an Invalid MAC Address Error When Attempting to Activate a Generator?
URL Name
What-Do-I-Do-if-I-Get-an-Invalid-MAC-Address-Error-When-Attempting-to-Activate-a-Generator

Public Content

Invalid MAC Address During Activation

Some customers have reported seeing an "Invalid MAC Address" error displayed on the control panel screen when attempting to activate a generator. Activating a generator is required to run the unit in auto mode. Activation also begins the generator warranty. For more information, see: How Do I Activate My Home Standby Generator?

Environment

This issue has been observed when attempting to activate a home standby generator that has an Evolution controller.

Required action

If you see this error, please contact Generac Customer Support to assist with completing the activation process.

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