California Rule 21

What you need to know to be in compliance

What you need to know about CA Rule 21

Enphase Rule 21 compliance is achieved with the application of an Enphase Rule 21 compatible grid profile to certified hardware.

  • CA Rule21 201709 grid profile defines utility approved operating parameters for those California Enphase systems whose application for interconnection was submitted after September 8, 2017.
  • Additionally, Enphase will make available the Enphase CA Rule21 201807 VV w/RPP for those California Enphase systems whose application for interconnection was submitted after July 26, 2018. CA Rule21 201807 VV w/RPP implements Reactive Power Priority as required by CPUC Resolution E-4920.

Use the resources below to learn how to apply the appropriate grid profile to your certified hardware and how to generate a compliance report for your utility.

 


 

Certified hardware

The IQ platform and S-Series Microinverters are certified for Rule 21. Visit the CEC website here for a simplified listing of compliant products. For CPUC Resolution E-4920 compliance, see the UL Letter of Compliance.

The grid profile can be applied any time before, during, or after installation and requires Envoy software version 4.10 or greater. Learn how to update the Envoy onsite using the Installer Toolkit here.

Prior to Install: This is the recommended approach. Without ever leaving the office, simply select the appropriate grid profile on the site activation form, and the profile will be applied to the microinverters when the site Envoy connects to Enlighten. Watch this video to learn how to apply the grid profile using the activation form.

During Install: If the profile has not already been set prior to the installation, set it during the installation using the Installer Toolkit mobile app. Watch this video to learn how to apply the profile using the Installer Toolkit and how to generate a Summary Report to demonstrate Rule 21 compliance.

After Install: Have systems that have already been installed been updated to the Rule 21 profile? You can apply the appropriate grid profile and run the report at any time simply by updating the system activation form. Watch this video to learn how to apply the grid profile using the activation form.

 


 

Compliance reporting

A utility compliance report can be generated at any time. The instructions for this are included in the profile application videos above.

 


 

Learn more about Rule 21

Want to learn more about Rule 21? Read our blog post on the topic here or download our E-4920 Technical Brief here.

Want to learn more about CPUC Resolution E-4920 and Reactive Power Priority? Attend an upcoming Rule 21 webinar.