S-5! PVKIT is now UL 3741 certified
The shift to UL 3741-compliant rooftop PV systems is well underway, and S-5! just joined the club in a big way.
S-5!, known for its expertise in metal roof attachment solutions, has announced that its PVKIT® rail-less mounting system is now officially UL 3741 certified. The certification applies when the PVKIT is used with all S-5! clamps and brackets, MLPE clips, and designated partner products.
Why is this important? Because UL 3741 is rapidly becoming a go-to standard for meeting rapid shutdown requirements in the National Electrical Code (NEC). And unlike module-level power electronics (MLPE), which require shutdown devices at every panel, UL 3741 opens up a new path: safer systems using string inverters and solid wire management.
UL 3741: A Quick Refresher
UL 3741, the Standard for Safety for Photovoltaic Hazard Control, is a system-level certification designed to reduce shock hazards for firefighters during emergency rooftop operations. Instead of relying solely on MLPE for rapid shutdown, UL 3741 evaluates the full PV system—mounting, wiring, and electrical—to ensure safety when first responders are walking, kneeling, or cutting into panels.
For more detail, check out Our Definitive Guide to UL 3741
This certification gives EPCs and installers another code-compliant option that could simplify system design and reduce costs. When paired with the S-5! PVKIT, that solution becomes even more appealing, especially for metal rooftops where rail-less designs already shine.
What S-5! Is Saying
“Our customers asked, and we listened,” says Ricardo Barroso, Director of R&D at S-5!. “We pursued this certification to support safer metal rooftops and reliable solar integration.”
According to Barroso, the PVKIT underwent the most rigorous and updated version of UL 3741 testing. “Firefighter safety is paramount, and UL 3741 helps ensure they can do their jobs without added risk from rooftop PV systems.”
A Rail-Less, Code-Compliant Option
The S-5! PVKIT system—already a favorite for metal roofs thanks to its streamlined design—now brings even more value to the table. With UL 3741 certification in hand, EPCs and installers can:
- Skip MLPE where local code allows
- Stick with string inverters and still meet NEC 690.12
- Offer safer, more cost-effective installs
- Stay compliant and competitive
Bottom Line
This move by S-5! isn’t just about compliance—it’s about meeting installer needs with a more flexible, safe, and straightforward way to build PV systems on metal roofs. The UL 3741 badge on the PVKIT will matter more and more as AHJs and fire codes evolve.
Keep an eye out for this standard in upcoming projects—and make sure your mounting system makes the cut. Learn more about the PVKIT and UL 3741 certification at www.S-5.com.
