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Fronius Webinar: Rule 21 Overview

Rule 21 Overview: What you need to know  

Presented by: Jock Paterson, Technical Sales Advisor, Fronius USA

Rule 21 refers to the generator interconnection requirements of each Californian Investor-Owned Utility (IOU). A years-long process has been underway to update Rule 21 with “smart inverter” requirements. Rule 21 requires inverters to have new functions and a new certification under UL 1741. Inverters also get a new nameplate label that identifies it as a “Grid Support Utility Interactive Inverter.” As a driving force for smart grid integrated inverters find out how Fronius will implement the new regulation with certifications and more.