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Scaling DER Communications in California: Protocol Certification Requirements

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Learn the Key Industry Certifications Required by CA Rule 21

Given the variety of interests and opinions about what testing and certifications advance the efficiency and interoperability of deploying DER communications infrastructure, the landscape of standards and certifications can be confusing. This paper identifies the current, future, required and optional certifications relevant to implementing CA Rule 21 for Smart Inverter communications. You’ll read about:

  • UL 1741SA Certification
  • IEEE 1547-2003
  • SunSpec IEEE 2030.5 DER Certification
  • IEEE1547-2018 Interoperability Certification