Strong – Unique Compressed Rail Mounting System provides superior strength.
Versatile – Rack your PV horizontally or tilt it using CompRail and SunEarth’s RexRack commercial-grade racking.
Aesthetic – “Seamless” appearance.
Cost Effective – Greatly reduces roof penetrations (compared to other products on the market) and significantly lowers installation costs.
Most PV racking systems on the market today utilize dual strut style runners underneath rows of PV modules. Top-side clips are then used to attach the PV modules to the runners.
The CompRail Compressed Rail Mounting System (CRMS) is distinctly different. CompRail utilizes a common lower rail that bridges adjacent rows of modules. The PV modules rest on shelves that extend from each side of the lower rail. The modules are then held captive by an upper rail that bolts into the lower rail and compresses the PV modules between the rails.
Because both rails are monolithic and extend the entire length of the row, they form a structurally superior frame that utilizes the continuous PV framewall to increase the rigidity of the entire racking structure.
The CompRail system has two distinct components: an upper rail and a lower rail that are compressed by a 5/16"-18 stainless steel button head bolt. Both rails are fabricated from 6063-T6 aluminum alloy and are available in mill finish, clear or bronze anodized material.
The lower mill finish rail contains a captive threaded insert made from cold headed 5056 aluminum. The inserts for the anodized material are formed from 400 series Monel. The insert is cold formed onto the rail and does not require access when tightening the compression bolt.
A drill starter mark/groove has been placed on the back side of the lower rail to center the attachment point holes used to fasten the lower rails to the strut feet or runners.
The upper rail is a structural hollow that allows the compression force of the bolt to be spread over a large distance of the PV frame. The upper rail has 3/8" bolt holes placed at 20" O.C. to match the threaded inserts in the lower rail.
CompRail is designed to provide the optimal blend of appearance, mechanical integrity and cost effectiveness. CompRail achieves an aesthetic "seamless" top-side appearance by utilizing a monolithic rail system. This same monolithic structure, coupled with a structural hollow upper rail, makes CompRail one of the most rigid mounting racks on the market. This structural integrity does not come, however, at the expense of added material cost. CompRail has been designed with the assistance of computer-based finite element analysis to locate more material where the rail will be stressed and remove it from sections where it serves no purpose. The incorporation of all stainless steel fasteners provides the assurance that CompRail will maintain its strength over the life of the system in even the most adverse environments. This optimization of design elements makes CompRail attractive, strong, durable, and cost effective.
CompRail is based on an entirely different design philosophy than under-module racking systems utilizing Dual Strut Runners (DSR). Many examples of the DSR style systems are commercially available, including: UniRac, Pro Solar, Two Seas, and Direct Power & Water. The primary advantages of CompRail over DSR type racking systems are as follows: