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operating temperature of the module. Also it is important to note that the maximum distance
between modules should not exceed 12" based on using standard wiring.
recommended standoff distance between Bosch Solar Energy modules and the roof is 1.57 inches
(40mm).
B. Wind and Snow Loads
All s o l a r installations should also be in accordance with local building codes and regulations.
For proper structural design, it is recommended to retain the services of a structural engineer
experienced with the installations of PV systems. It is important to reference the most current
revision of ASCE 7 for determining the proper wind and snow load calculations for the project site.
Bosch Solar Energy modules have been evaluated by UL for a maximum positive or negative design
2
loading of 50 lbs/ft
(2,400 Pa).
C. Mounting Methods
Bosch Solar Energy modules may be secured via a variety of traditional mounting methods including
bolt and clamp styles. Contact Bosch Solar Energy if alternate methods of mounting are required.
Regardless of mounting method employed, always thoroughly review and follow the instructions of the
mounting structure manufacturer. To comply with the requirements of UL 1703 the modules must be
fixed using hex-head bolts. For greater longevity, Bosch Solar Energy recommends that all fixings are
made of 316 grade (A4) stainless steel (not supplied). Prevention of the corrosive effects of dissimilar
metals must be considered when mounting the solar module frame (Aluminum) against other
materials.
D. Bolting Mounting Method Example
Many installations utilize the traditional 'bolting' mounting method (i.e. fastening the module to the
support structure via four (or sometimes six) mounting holes that are located on the mounting frame).
The recommended installation method is as follows:
1) Secure the module to the structure using the factory mounting holes or along the module
frame above the factory mounting holes (refer to Figure 6A)
2) A quantity of four ¼" (M6) stainless steel bolts with length less than ¾" (20 mm), with four ¼"
(M6) stainless steel nuts, washers, and spring washers are recommended for mounting one
module. (Figure. 6B).
3) The maximum mounting torque for the ¼" bolts should not exceed 12-15 ft-lbs or 9-10 N.m for
a M6 bolt
4) Please refer to Figures 5A and 5C for the module dimensions and hole locations
5) Maintain a gap of least ¼" (6 mm) between neighboring modules.
6) When mounting multiple rows of PV modules be sure to maintain enough distance to prevent
shading by adjacent rows.
7) Make sure to face the glass side of the module to the sun
8) DO NOT remove or alter the module frame. Creating additional mounting holes may damage
the module and reduce the strength of the frame and will invalidate the warranty.
Copyright Bosch Solar Energy Corp., version 1.0
The minimum
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