On July 11, 2019, the CPUC approved Resolution E-5000.
Resolution E-5000 clarifies and mandates smart inverter Phase 2 Communication Requirements and Phase 3 Functions (1, 2, 3, 8) in addition to all previous smart inverter requirements. The effective date for these requirements has been extended by the CPUC from January 22, 2020, to the new effective date of June 22, 2020. All new interconnection applications must apply with a smart inverter that is certified or otherwise compliant with the resolution process.
On April 26, 2018, the CPUC approved Resolution E-4920 and Resolution E-4898.
Resolution E-4920 requires smart inverters to be UL-1741 SA certified with reactive power priority (RPP). Effective July 25, 2018, all new interconnection applications must apply with a smart inverter that is programmed for RPP.
Resolution E-4898 requires smart inverters to be UL-1741 SA certified with the capability to perform Phase 3 Advanced Functions 5 & 6. Effective February 22, 2019, all new interconnection applications must apply with a smart inverter that is programmed with Advanced Functions 5 & 6.
It is the responsibility of the customer/installer/contractor to ensure the equipment purchased meets both the smart inverter requirements adopted in E-5000, E-4920, and E-4898. We recommend verifying with the inverter manufacturer to ensure the inverter meets all Rule 21 requirements.
The California Energy Commission (CEC) manages the list of eligible inverter equipment and facilitates the request to add eligible inverters to the list. For more information, visit the CEC-dedicated Rule 21 Smart Inverter Working Group website.
SCE will now he a new internal certification verification process for certified power control systems meeting the new UL-1741 CRD (Certification Requirement Decision) Standard. Please submit the NRTL documentation and request for internal verification of certification to Smartinvertertechnicalinformation@sce.com. The list of Certified Power Controls UL-1741 CRD has been updated and will be periodically refreshed to include smart inverters certified with the new standard.