S-5!, a metal roof attachment manufacturer, had its PVKIT rail-less solar mounting system certified for UL 3741 compliance. This certification applies to the complete system when used with all S-5! clamps and brackets, MLPE clips and partner products.
PVKIT from S-5!
This milestone in product safety and performance was certified through testing and evaluation using the latest standards.
“As firefighter safety becomes a growing concern with the proliferation of rooftop solar systems, UL 3741 compliance is becoming a common — and increasingly required — standard across both residential and commercial projects,” said Ricardo Barroso, S-5! research and development director. “Our customers asked, and we listened. We pursued this certification to support safer metal rooftops and reliable solar integration.”
UL 3741, Standard for Safety for Photovoltaic Hazard Control, is one of the recognized methods for meeting the National Electrical Code’s rapid shutdown requirements, specifically focused on reducing electric shock hazards for first responders. It evaluates the safety of a complete solar PV system — including racking, wiring and electrical components — during typical firefighter interactions such as stepping, kneeling or accidentally striking the system in emergency conditions.
Unlike other methods that rely on MLPE with rapid shutdown on each panel, UL 3741 meets system-level safety using string inverters and proper wire management.
“Our PVKIT system passed rigorous testing to ensure confidence in both S-5! components and the third-party products we list with our system,” Barroso said. “Firefighter safety is paramount, and UL 3741 helps ensure they can do their jobs without added risk from rooftop PV systems.”
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