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 201902 VV VW FW grid profile defines utility approved operating parameters for those California Enphase systems whose application for interconnection was submitted on or after February 22, 2019. This profile will be available by the February 22 deadline and meets all previously adopted CA Rule 21 requirements and adds two new functions, Volt/Watt (VW) and Frequency/Watt (FW), as required by CPUC Resolution E-4898.
  • CA Rule21 201807 VV w/RPP grid profile defines utility approved operating parameters for those California Enphase system whose application for interconnection was submitted after July 26, 2018 as required by CPUC Resolution E-4920.
  • 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.

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

All IQ platform Microinverters are certified for Rule 21 requirements taking effect February 22, 2019. S-Series Microinverters will not be compliant with February 22, 2019 requirements. Visit the CEC website here for a simplified listing of compliant products. Certificates of compliance can be found at the following links:

Grid profiles may 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 latest Technical Brief here.

Want to learn more about California Rule 21? Attend an upcoming Rule 21 webinar.

The PUC published new compliance dates in their letter of January 2, 2019. Download the letter here. Compliance dates as of January 2, 2019 are also listed in the table below.

CA Rule 21
Phase
Function Effective Date
2 IEEE 2030.5 Communication Certificate August 22, 2019
3 Function 1: Monitor Key DER Data August 22, 2019
3 Function 2: DER Disconnect/ Reconnect December 2019
3 Function 3: Limit Maximum Active Power December 2019
3 Function 4: Set Active power To be determined*
3 Function 5: Frequency Watt February 22, 2019
3 Function 6: Volt Watt February 22, 2019
3 Function 7: Dynamic Reactive Support To be determined*
3 Function 8: Scheduling Power Values and Modes August 22, 2019

* There is currently no effective date for this requirement.