4.0 MeChanICal InsTallaTIon
4.1 PlannIng and desIgn
•
Before installation, check to ensure the sub-structure will accommodate expected system loads. This includes and is
not limited to roof, foundations, mechanical structure, and mechanical connections.
•
For roof installations, utilize a fire-resistant roof covering rated for the application. A minimum clearance of 6 inches is
required between the roof and bottom of the module frame.
•
Mechanical structures should not contact the module backsheet, any racking, or microinverter under any expected
load conditions
•
Consider the following factors during system design, which will influence performance:
a) SunEdison solar modules produce the most power when they are pointed directly at the sun, and should be
tilted for optimum system performance.
b) Proximity to obstructions such as: walls, buildings, trees, groundcover, snow cover, or dust and debris that have
the potential to shade or damage the modules.
c) Elevated temperatures will decrease energy yield, so designs should ensure adequate airflow across the back of
the module.
d) Allow a minimum spacing of 10 mm between modules for thermal expansion.
4.2 Module MounTIng oPTIons
For clamp or bolt mounting locations, please refer to table 4.2A
•
Each module should be mounted using four bolts through the mounting holes on the rear side of the module, or with
four clamps over the front side. No more than two clamps per side may be used.
•
Depending on the desired load capability of the array, modules may be mounted either perpendicular or parallel to the
structure rails. Clamps can be mounted anywhere inside of the safe mounting range for each case illustrated in table 4.2A.
•
If using bolts, use a bolt stack no smaller than ¼"-20 or M6, with two flat washers and a locking washer as
shown in Appendix 7.1.
•
To ensure an adequate clamping area, all clamps must be able to clamp within the range specified in Table 4.2A. All fasteners
used to fix the modules with clamps should be no smaller than ¼”-20 or M6.
•
To provide adequate fixing or clamping force, torque the fasteners to the manufacturers torque specifications.
•
For all cases, the area of the supporting structure in contact with rear side of the module must comply with the
dimensions specified in Appendix 7.1.
•
All other structural dimensions, such as clamp and rail thickness, should be sized appropriately for the intended site load.
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Installation Manual: sunedison silvantis 60 Cell Pv Modules
© Copyright 2013 SunEdison, Inc.
