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US industry experts trace the evolution of PV rapid shutdown rules and outline how recent updates to UL 3741 are reshaping compliance pathways for rooftop and commercial solar in the United States.

Research by 3E and Statkraft has used a new performance measure for solar trackers to uncover “alarming” evidence of a gap between claimed and actual performance.

Ryan Mayfield led an informative discussion on the history of the NEC PV Hazard Control System rules and the latest changes to the UL 3741 standard.