EG4 BrightMount Cat1 Extension Rail

EG4 BrightMount Cat1 Extension Rail Kit – For Panels Up to 44.65"

Expand Your Ground Mount to Support Larger Modules

The EG4 BrightMount Cat1 Extension Rail Kit allows you to upgrade your existing BrightMount Cat1 Solar Ground Mount system to support solar panels up to 44.65 inches (1134 mm) wide. Designed for compatibility with EG4’s ground-mount racking architecture, this kit increases the horizontal spacing between rail connection points, giving installers the flexibility to accommodate larger or non-standard panel sizes without replacing the entire mounting system.

Built for Seamless Structural Integration

These extension rails are engineered to integrate directly with the standard BrightMount Cat1 rack, maintaining the structural integrity, corrosion resistance, and alignment of the original system. Each kit includes one pair of extension rails—enough to expand the capacity of a single rack. The result is a seamless upgrade path that meets both residential and commercial mounting requirements without adding unnecessary complexity to the install.

Quick Installation for New or Existing Systems

Installation is fast and straightforward with a bolt-on design that fits pre-drilled points on the existing rack structure. Whether you're adding the extension to a new build or retrofitting an existing BrightMount Cat1 system, this kit ensures minimal downtime and maximum adaptability on the job site.

Adaptable and Cost-Effective Mounting Solution

Rather than replacing your full racking system, the Extension Rail Kit provides a low-cost option to support wider solar modules. This is particularly valuable for newer high-wattage panels that often exceed 43.3 inches in width. For system designers and installers, the upgrade reduces equipment costs while increasing array compatibility and layout flexibility.

What's Included

• (2) Extension rails (1 pair) for one BrightMount Cat1 rack
• Pre-drilled for standard BrightMount connection points
• Compatible with panel widths up to 44.65 inches (1134 mm)

Installation Reference

For installation instructions, refer to the latest version of the BrightMount Adjustable Cat1 User Manual. Always confirm panel compatibility prior to installation.