S-5! launches the PVKIT 3.0 rail-less mounting system for metal roofs
The commercial hardware enables direct-attach solar module mounting with an optional 50 mm clearance gap for roof electronics.
US manufacturer S-5! has unveiled the PVKIT 3.0, a height-adjustable, rail-less solar mounting system designed specifically for metal roofs, according to pv-magazine.com pv-magazine.com
pv-magazine.compv-magazine.comOpen source ↗. The commercial solution addresses the spatial requirements of rooftop photovoltaic installations that incorporate module-level power electronics (MLPE), such as power optimizers and microinverters, alongside complex cable management networks.
Clearance options and direct attachment
The PVKIT 3.0 functions as a direct-attach hardware system when paired with the company's proprietary metal clamps and brackets. For standing-seam and concealed-fastener roofs, the installation process maintains roof integrity via non-penetrating mechanical attachments. The manufacturer introduced two operational configurations: a standard profile for flush installation close to the roof deck, and an elevated profile that introduces a fixed 50 mm clearance beneath the array.
According to technical specifications published by S-5!, frame compatibility varies depending on the chosen configuration. The standard setup accepts solar module frame thicknesses between 28 mm and 35 mm. The elevated configuration with the 50 mm clearance accepts panel frames ranging from 25 mm to 35 mm, providing room for under-module airflow and hardware placement.
Mechanical properties and logistics
The direct-attach approach eliminates conventional mounting rails entirely, removing the need for on-site metal cutting during deployment pv-magazine.com
pv-magazine.compv-magazine.comOpen source ↗. The manufacturer states that the design reduces total mounting system weight, physical volume, and manufacturing carbon footprint by up to 85% compared to traditional rail installations. The engineering layout also reduces point load distribution onto the underlying roof structure by 25%.
To simplify electrical integration and physical installation, the assemblies are delivered pre-assembled and require a single tool for roof attachment. Electrical bonding between adjacent aluminum frames relies on integrated stainless steel grounding teeth, which establish continuity directly through the module coatings. The company ships the hardware with corrosion-resistant components backed by a lifetime warranty.
